I have the same problem: 10.5.8, I just got a HP scanjet 5590, I downloaded the drivers from HP:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us &prodNameId=377691&prodTypeId=15179&prodSeriesId=377689&swLang=8&taskId=135&swEn vOID=219
when I try to start HP Scan Pro, I get the console error:
24.02.11 21:30:19 com.apple.launchd[310] ([0x0-0x60060].com.hp.Device.Manager[739]) Exited: Terminated
24.02.11 21:30:41 ReportCrash[757] Formulating crash report for process HP Scanjet Manager[756]
24.02.11 21:30:42 ReportCrash[757] Saved crashreport to /Users/loic/Library/Logs/CrashReporter/HP Scanjet Manager
2011-02-24-213040heat.crash using uid: 502 gid: 20, euid: 502 egid: 20
24.02.11 21:30:42 com.apple.launchd[310] ([0x0-0x67067].com.hp.scanjet_manager[756]) Exited abnormally: Segmentation fault
24.02.11 21:30:45 ReportCrash[757] Formulating crash report for process HP Scan Pro[758]
24.02.11 21:30:45 ReportCrash[757] Formulating crash report for process HP Scan Pro[758]
24.02.11 21:30:45 ReportCrash[757] Saved crashreport to /Users/loic/Library/Logs/CrashReporter/HP Scan Pro
2011-02-24-213043heat.crash using uid: 502 gid: 20, euid: 502 egid: 20
24.02.11 21:30:45 com.apple.launchd[310] ([0x0-0x68068].com.hp.scanpro[758]) Exited abnormally: Segmentation fault
Message was edited by: Loïc JAOUEN