Okay, so got home and checked the mouse and keyboard, un and re plugged them in; unplugged the GarageBand controller I had connected and my printer, which has been troublesome lately. Started up and... fine, no problem. Now I just have to hope it doesn't happen again.
I will be updating shortly to Lion (after first updating to SnowLeopard). But if their is a hard disk problem that wouldn't help, would it?
Here's the quite lengthy error report that appeared after I started up and logged in. Perhaps someone can decipher it?
panic(cpu 0 caller 0x001A49CB): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:
CR0: 0x8001003b, CR2: 0x00000000, CR3: 0x00fa1000, CR4: 0x000006e0
EAX: 0x00000000, EBX: 0x039b1500, ECX: 0x00000000, EDX: 0x00000000
CR2: 0x00000000, EBP: 0x25133ef8, ESI: 0x039b1500, EDI: 0x00000000
EFL: 0x00010246, EIP: 0x00848ca6, CS: 0x00000008, DS: 0x00000010
Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x25133ce8 : 0x128d0d (0x3cc65c 0x25133d0c 0x131f95 0x0)
0x25133d28 : 0x1a49cb (0x3d2a94 0x0 0xe 0x3d22b8)
0x25133e38 : 0x19b3a4 (0x25133e50 0x39c6ef0 0x25133e98 0x13597b)
0x25133ef8 : 0x9064e1 (0x39b1500 0x297 0x25133f28 0x907564)
0x25133f28 : 0x909e92 (0x39c0b00 0x39c0ba4 0xaa 0x0)
0x25133f58 : 0x90a268 (0x39c0b00 0x0 0x25133f78 0x19e23a)
0x25133f78 : 0x13d989 (0x39c0b00 0x0 0x19e23a 0x385df5c)
0x25133fc8 : 0x19b21c (0x0 0x0 0x19e0b5 0x385f3b4) Backtrace terminated-invalid frame pointer 0x0
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.IOAHCIBlockStorage(1.0.7)@0x905000
dependency: com.apple.iokit.IOStorageFamily(1.5.1)@0x51b000
dependency: com.apple.iokit.IOAHCIFamily(1.0.3)@0x845000
Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386
Model: iMac7,1, BootROM IM71.007A.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 2 GB
Graphics: ATI Radeon HD 2600 Pro, ATI,RadeonHD2600, PCIe, 256 MB
Memory Module: BANK 0/DIMM0, 1 GB, DDR2 SDRAM, 667 MHz
Memory Module: BANK 1/DIMM1, 1 GB, DDR2 SDRAM, 667 MHz
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x88), Broadcom BCM43xx 1.0 (4.170.46.9)
Bluetooth: Version 1.9.5f4, 2 service, 0 devices, 1 incoming serial ports
Network Service: Built-in Ethernet, Ethernet, en0
Serial ATA Device: WDC WD3200AAJS-40RYA0, 298.09 GB
Parallel ATA Device: MATSHITADVD-R UJ-85J
USB Device: Built-in iSight, Apple Inc., Up to 480 Mb/sec, 500 mA
USB Device: Keyboard Hub, Apple, Inc., Up to 480 Mb/sec, 500 mA
USB Device: Apple Optical USB Mouse, Primax Electronics, Up to 1.5 Mb/sec, 100 mA
USB Device: Apple Keyboard, Apple, Inc, Up to 1.5 Mb/sec, 100 mA
USB Device: IR Receiver, Apple Computer, Inc., Up to 1.5 Mb/sec, 500 mA
USB Device: Bluetooth USB Host Controller, Apple, Inc., Up to 12 Mb/sec, 500 mA