computer running slow and safari crashes

I posted the following message in the safari section and got no responses, I hope this forum will be more fruitful;).
My friends' iMac G4, running OS 10.3.9 has started acting strangely including Safari crashing on certain web sites. I had them clean out the cache, remove the cookies, delete the history and run disk utility--things they never did on their own. But the problem has persisted. I plan on having them reset safari and trash the safari preferences but I'm concerned it may be more of a system wide problem rahter than a problem with safari alone. They did email me the crash log, could someone comment on this and determine if it helps point to the root cause of the problem. Incidently I also plan on running disk warrior when I get over there in the near future. Here is the crash log...

Exception: EXC BADACCESS (0x0001)
Codes: KERN INVALIDADDRESS (0x0001) at 0xffffffff

Thread 0 Crashed:
0 com.apple.JavaScriptCore 0x961d1f64 compile_branch + 0x2dc

Thread 1:
0 libSystem.B.dylib 0x90007878 mach msgtrap + 0x8
1 libSystem.B.dylib 0x900073f8 mach_msg + 0x38
2 com.apple.CoreFoundation 0x901c2258 __CFRunLoopRun + 0x350
3 com.apple.CoreFoundation 0x901c69e4 CFRunLoopRunSpecific + 0x148
4 com.apple.Foundation 0x90a2d068 -NSRunLoop runMode:beforeDate: + 0xac
5 com.apple.Foundation 0x90a45c74 -NSRunLoop run + 0x4c
6 com.apple.WebKit 0x94ff2e6c +WebFileDatabase _syncLoop: + 0xa8
7 com.apple.Foundation 0x90a6a3c8 forkThreadForFunction + 0x6c
8 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

Thread 2:
0 libSystem.B.dylib 0x90007878 mach msgtrap + 0x8
1 libSystem.B.dylib 0x900073f8 mach_msg + 0x38
2 com.apple.CoreFoundation 0x901c2258 __CFRunLoopRun + 0x350
3 com.apple.CoreFoundation 0x901c69e4 CFRunLoopRunSpecific + 0x148
4 com.apple.Foundation 0x90a2d068 -NSRunLoop runMode:beforeDate: + 0xac
5 com.apple.Foundation 0x90a45c74 -NSRunLoop run + 0x4c
6 com.apple.Foundation 0x90a97f0c +NSURLConnection(NSURLConnectionInternal) _resourceLoadLoop: + 0x20c
7 com.apple.Foundation 0x90a6a3c8 forkThreadForFunction + 0x6c
8 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

Thread 3:
0 libSystem.B.dylib 0x9000b42c select + 0xc
1 com.apple.Foundation 0x90a22874 _loadRunLoop + 0xd4
2 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

Thread 4:
0 libSystem.B.dylib 0x90007878 mach msgtrap + 0x8
1 libSystem.B.dylib 0x900073f8 mach_msg + 0x38
2 com.apple.CoreFoundation 0x901c2258 __CFRunLoopRun + 0x350
3 com.apple.CoreFoundation 0x901c69e4 CFRunLoopRunSpecific + 0x148
4 com.apple.Foundation 0x90a2d068 -NSRunLoop runMode:beforeDate: + 0xac
5 com.apple.Foundation 0x90a45c74 -NSRunLoop run + 0x4c
6 com.apple.Foundation 0x90a9844c +NSURLCache _diskCacheSyncLoop: + 0xa8
7 com.apple.Foundation 0x90a6a3c8 forkThreadForFunction + 0x6c
8 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

Thread 5:
0 libSystem.B.dylib 0x9000b42c select + 0xc
1 com.apple.CoreFoundation 0x901c7668 __CFSocketManager + 0x1fc
2 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

Thread 6:
0 libSystem.B.dylib 0x90007878 mach msgtrap + 0x8
1 libSystem.B.dylib 0x900073f8 mach_msg + 0x38
2 com.apple.CoreFoundation 0x901c2258 __CFRunLoopRun + 0x350
3 com.apple.CoreFoundation 0x901c69e4 CFRunLoopRunSpecific + 0x148
4 com.apple.Foundation 0x90a2d068 -NSRunLoop runMode:beforeDate: + 0xac
5 com.apple.Foundation 0x90a45c74 -NSRunLoop run + 0x4c
6 com.apple.Safari 0x000368f8 0x1000 + 0x358f8
7 com.apple.Foundation 0x90a6a3c8 forkThreadForFunction + 0x6c
8 libSystem.B.dylib 0x90024930 pthreadbody + 0x28

PPC Thread State:
srr0: 0x961d1f64 srr1: 0x0200f030 vrsave: 0xfff00000
cr: 0x22222242 xer: 0x00000004 lr: 0x961d2018 ctr: 0x961d1f5c
r0: 0x961d1f5c r1: 0xbfffca20 r2: 0xffffffff r3: 0x00000001
r4: 0xbfffcef0 r5: 0x00000000 r6: 0x0024ff03 r7: 0xfeffff87
r8: 0xfeffff07 r9: 0x000001f0 r10: 0x00000000 r11: 0x016b2216
r12: 0x00000000 r13: 0x00000000 r14: 0xbfffcb54 r15: 0xffffffff
r16: 0xbfffcb58 r17: 0xbfffcb5c r18: 0xbfffd30c r19: 0x08000800
r20: 0x00000000 r21: 0xbfffcef0 r22: 0xbfffd3b0 r23: 0x06baea1a
r24: 0x06baea17 r25: 0x00000000 r26: 0x0000002d r27: 0x0000fee5
r28: 0x016b2212 r29: 0x0000007c r30: 0x06baea3b r31: 0x961d1cb8

Binary Images Description:
0x1000 - 0xcdfff com.apple.Safari 1.3.2 (312.6) /Applications/Safari.app/Contents/MacOS/Safari
0x1710000 - 0x1712fff com.apple.PDFImporter 1.3.1 (???) /System/Library/Components/PDFImporter.component/Contents/MacOS/PDFImporter
0x4ed2000 - 0x51e6fff com.macromedia.Flash Player.plugin 9.0.28 (1.0.4f22) /Library/Internet Plug-Ins/Flash Player.plugin/Contents/MacOS/Flash Player
0x6919000 - 0x691bfff com.apple.textencoding.unicode 1.6.4 /System/Library/TextEncodings/Unicode Encodings.bundle/Contents/MacOS/Unicode Encodings
0x41410000 - 0x414affff com.apple.QuickTimeImporters.component 7.2 /System/Library/QuickTime/QuickTimeImporters.component/Contents/MacOS/QuickTime Importers
0x73230000 - 0x73233fff libmx.A.dylib /usr/lib/libmx.A.dylib
0x76c02000 - 0x76c12fff com.apple.Accelerate.vecLib 3.0.3 (vecLib 3.0.3) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/vecLib
0x806c0000 - 0x806e9fff libxslt.1.dylib /usr/lib/libxslt.1.dylib
0x80830000 - 0x8090efff libxml2.2.dylib /usr/lib/libxml2.2.dylib
0x80a50000 - 0x80ad4fff libstdc++.6.dylib /usr/lib/libstdc++.6.dylib
0x80c80000 - 0x80c88fff libgcc_s.1.dylib /usr/lib/libgcc_s.1.dylib
0x88100000 - 0x88236fff com.apple.vImage 1.0.0 (1.2.0) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.fr amework/Versions/A/vImage
0x88ee0000 - 0x88eecfff com.apple.agl 2.5 (AGL-2.5) /System/Library/Frameworks/AGL.framework/Versions/A/AGL
0x8fc90000 - 0x8fc90fff com.apple.Accelerate 1.0.3 (Accelerate 1.0.3) /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
0x8fe00000 - 0x8fe4ffff dyld /usr/lib/dyld
0x90000000 - 0x9014ffff libSystem.B.dylib /usr/lib/libSystem.B.dylib
0x901c0000 - 0x9026efff com.apple.CoreFoundation 6.3.9 (299.37) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x902b0000 - 0x90529fff com.apple.CoreServices.CarbonCore 10.3.9 (558) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonC ore.framework/Versions/A/CarbonCore
0x90610000 - 0x9069afff com.apple.CoreServices.OSServices 3.0.1 /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServi ces.framework/Versions/A/OSServices
0x90700000 - 0x90700fff com.apple.CoreServices 10.3 (???) /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
0x90702000 - 0x9073afff com.apple.LaunchServices 10.3.5 (98.4) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ LaunchServices.framework/Versions/A/LaunchServices
0x9074e000 - 0x9078afff com.apple.LDAPFramework 1.3.3 (37.3.1) /System/Library/Frameworks/LDAP.framework/Versions/A/LDAP
0x907ae000 - 0x907b9fff com.apple.securityhi 1.2 (90) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SecurityHI.fr amework/Versions/A/SecurityHI
0x907c7000 - 0x907cffff libbsm.dylib /usr/lib/libbsm.dylib
0x907f0000 - 0x907f9fff com.apple.DiskArbitration 2.0.5 /System/Library/PrivateFrameworks/DiskArbitration.framework/Versions/A/DiskArbi tration
0x90810000 - 0x90810fff com.apple.ApplicationServices 1.0 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Application Services
0x908c2000 - 0x90910fff com.apple.print.framework.Print 3.3 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framewo rk/Versions/A/Print
0x90940000 - 0x909b3fff com.apple.DesktopServices 1.2.6 /System/Library/PrivateFrameworks/DesktopServicesPriv.framework/Versions/A/Desk topServicesPriv
0x909f0000 - 0x90a0afff libGL.dylib /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
0x90a20000 - 0x90b7bfff com.apple.Foundation 6.3.10 (500.63) /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x90c32000 - 0x90c46fff libCGATS.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib
0x90c60000 - 0x90cc2fff libGLU.dylib /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLU.dylib
0x90d00000 - 0x90d1bfff com.apple.SystemConfiguration 1.7.1 (???) /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfi guration
0x90d40000 - 0x90d40fff com.apple.Carbon 10.3 (???) /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x90d60000 - 0x90d6bfff com.apple.opengl 1.3.8 /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
0x90d70000 - 0x90da1fff com.apple.securityinterface 1.0 (39) /System/Library/Frameworks/SecurityInterface.framework/Versions/A/SecurityInter face
0x90dd0000 - 0x90df0fff com.apple.DirectoryService.Framework 1.7.2 /System/Library/Frameworks/DirectoryService.framework/Versions/A/DirectoryServi ce
0x90e77000 - 0x90e87fff libsasl2.2.0.1.dylib /usr/lib/libsasl2.2.0.1.dylib
0x90e8b000 - 0x90e9afff libPSRIP.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libPSRIP.A.dylib
0x90ea1000 - 0x90eb4fff libRIP.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
0x90ec0000 - 0x90ec0fff com.apple.Cocoa 6.3 (???) /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
0x910c8000 - 0x910c9fff com.apple.securityfoundation 1.0 (6) /System/Library/Frameworks/SecurityFoundation.framework/Versions/A/SecurityFoun dation
0x910e0000 - 0x91134fff com.apple.bom 1.2.8 (64.2) /System/Library/PrivateFrameworks/Bom.framework/Versions/A/Bom
0x913a0000 - 0x9145ffff ColorSync /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ ColorSync.framework/Versions/A/ColorSync
0x914ad000 - 0x914fdfff com.apple.HIServices 1.4.1 (0.0.1d1) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ HIServices.framework/Versions/A/HIServices
0x91551000 - 0x9155cfff libCSync.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
0x915a2000 - 0x915bcfff libresolv.9.dylib /usr/lib/libresolv.9.dylib
0x915e0000 - 0x91699fff com.apple.QD 3.4.74 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ QD.framework/Versions/A/QD
0x916ef000 - 0x916f8fff libz.1.dylib /usr/lib/libz.1.dylib
0x916fc000 - 0x91714fff com.apple.WebServices 1.1.1 (1.1.0) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/WebServ icesCore.framework/Versions/A/WebServicesCore
0x91a2f000 - 0x91a55fff com.apple.FindByContent 1.4 (1.2) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ FindByContent.framework/Versions/A/FindByContent
0x92170000 - 0x92358fff com.apple.security 2.5 (29780) /System/Library/Frameworks/Security.framework/Versions/A/Security
0x924b3000 - 0x924c3fff com.apple.ImageCapture 2.1.5 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ImageCapture. framework/Versions/A/ImageCapture
0x924f2000 - 0x92565fff com.apple.NavigationServices 3.3.3 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/NavigationSer vices.framework/Versions/A/NavigationServices
0x92684000 - 0x9274bfff libcrypto.0.9.7.dylib /usr/lib/libcrypto.0.9.7.dylib
0x927f0000 - 0x92827fff com.apple.CFNetwork 1.2.6 (71.13) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwo rk.framework/Versions/A/CFNetwork
0x9283f000 - 0x9284efff com.apple.DSObjCWrappers.Framework 1.0 /System/Library/PrivateFrameworks/DSObjCWrappers.framework/Versions/A/DSObjCWra ppers
0x92856000 - 0x9286afff libcups.2.dylib /usr/lib/libcups.2.dylib
0x92880000 - 0x92c05fff com.apple.HIToolbox 1.3.7 (???) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.fra mework/Versions/A/HIToolbox
0x92e70000 - 0x9336ffff com.apple.AppKit 6.3.11 (743.43) /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x9366d000 - 0x936a5fff com.apple.AE 1.4 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ AE.framework/Versions/A/AE
0x938be000 - 0x9392dfff com.apple.framework.IOKit 1.3.6 (???) /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x939d0000 - 0x939d4fff libmathCommon.A.dylib /usr/lib/system/libmathCommon.A.dylib
0x939f0000 - 0x93ad7fff com.apple.AddressBook.framework 1.1.2 (321) /System/Library/Frameworks/AddressBook.framework/Versions/A/AddressBook
0x93b3c000 - 0x93ba5fff com.apple.htmlrendering 1.1.2 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HTMLRendering .framework/Versions/A/HTMLRendering
0x93ebd000 - 0x94195fff com.apple.CoreGraphics 1.203.33 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/CoreGraphics
0x94dba000 - 0x94e4dfff com.apple.print.framework.PrintCore 3.3 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ PrintCore.framework/Versions/A/PrintCore
0x94fe0000 - 0x95078fff com.apple.WebKit 312.9 /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit
0x954c0000 - 0x95ac6fff libBLAS.dylib /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libBLAS.dylib
0x95b20000 - 0x95df0fff libLAPACK.dylib /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libLAPACK.dylib
0x95e22000 - 0x95e32fff com.apple.speech.recognition.framework 3.3 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecogni tion.framework/Versions/A/SpeechRecognition
0x95e40000 - 0x95eadfff libvDSP.dylib /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libvDSP.dylib
0x95ec2000 - 0x95edcfff com.apple.openscripting 1.2.1 (???) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting .framework/Versions/A/OpenScripting
0x95f00000 - 0x95f20fff libvMisc.dylib /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libvMisc.dylib
0x96074000 - 0x960d3fff com.apple.SearchKit 1.0.2 /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SearchK it.framework/Versions/A/SearchKit
0x961b0000 - 0x96292fff com.apple.JavaScriptCore 1.1 (312.3.3) /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/JavaScriptCor e.framework/Versions/A/JavaScriptCore
0x968d0000 - 0x969b2fff libicucore.A.dylib /usr/lib/libicucore.A.dylib
0x96a04000 - 0x96a73fff libobjc.A.dylib /usr/lib/libobjc.A.dylib
0x96aa0000 - 0x96acefff libssl.0.9.7.dylib /usr/lib/libssl.0.9.7.dylib
0x96ade000 - 0x96af5fff com.apple.LangAnalysis 1.5.4 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ LangAnalysis.framework/Versions/A/LangAnalysis
0x96b01000 - 0x96b1bfff libPDFRIP.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libPDFRIP.A.dylib
0x96b50000 - 0x96bdffff ATS /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ ATS.framework/Versions/A/ATS
0x96c00000 - 0x96c8cfff com.apple.ink.framework 101.1.4 (55.12) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Ink.framework /Versions/A/Ink
0x96cb0000 - 0x96d9efff libiconv.2.dylib /usr/lib/libiconv.2.dylib
0x96e12000 - 0x96e25fff com.apple.speech.synthesis.framework 3.2 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ SpeechSynthesis.framework/Versions/A/SpeechSynthesis
0x96e80000 - 0x96e90fff com.apple.vecLib 3.0.3 (vecLib 3.0.3) /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib
0x97146000 - 0x97152fff com.apple.help 1.0.1 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Help.framewor k/Versions/A/Help
0x9715c000 - 0x97169fff com.apple.CommonPanels 1.2.1 (1.0) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CommonPanels. framework/Versions/A/CommonPanels
0x97900000 - 0x97bf2fff com.apple.WebCore 315.15 /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.frame work/Versions/A/WebCore
0x99000000 - 0x990b8fff com.apple.audio.toolbox.AudioToolbox 1.3.4 /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
0x99106000 - 0x99106fff com.apple.audio.units.AudioUnit 1.3.3 /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
0x99108000 - 0x9916ffff com.apple.audio.CoreAudio 2.1.3 /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio
0x991af000 - 0x991ccfff com.apple.audio.SoundManager 3.9 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CarbonSound.f ramework/Versions/A/CarbonSound
0x991de000 - 0x994fdfff com.apple.QuickTime 7.2.0 /System/Library/Frameworks/QuickTime.framework/Versions/A/QuickTime
0x995e1000 - 0x995f7fff com.apple.QuartzCore 1.3 /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
0x99604000 - 0x9a1cafff com.apple.QuickTimeComponents.component 7.2 /System/Library/QuickTime/QuickTimeComponents.component/Contents/MacOS/QuickTim eComponents

iMac G4 Mac OS X (10.3.9)