Apple Mail keeps crashing, please help

please could somebody helps to decipher crash reports and diagnose a problem I am having with Apple mail. Following bad RAM problem on my PowerMac G5/10.5.8 Apple Mail 3.6 started to crash, frequently shortly after I open it, or whenever I try to do anything with it, for example when selecting a message or attempting to send a mail; each time the spinning beachball appears, and mail crash. Please have a look at the crash report excepts.

No restarts, permissions repairs, or the use of DU, DiskWarrior ot TechTool Pro have helped.

I am pretty much devastated; any help shall be greatly appreciated indeed. Thank you.

Process: Mail [782] Path: /Applications/MAIL/http://ift.tt/1wDuaGn Identifier: com.apple.mail Version: 3.6 (936) Build Info: Mail-9360000~1 Code Type: PPC (Native)

Parent Process: launchd [66]

Date/Time: 2015-02-13 21:42:38.367 +0100 OS Version: Mac OS X 10.5.8 (9L31a)

Report Version: 6

Anonymous UUID: A75D0409-433A-44F1-9D38-E34AED349277

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Exception Codes: KERN_INVALID_ADDRESS at 0x00000000ce6f7b80

Crashed Thread: 11

Thread 11 Crashed:

0 ...ple.CoreServices.CarbonCore 0x93acd610 CSStoreGetUnit + 56 1 com.apple.LaunchServices 0x920c55d8 CSStringCopyCFString + 92 2 com.apple.LaunchServices 0x920e2acc CSStringBindingCopyCFStrings + 120 3 com.apple.LaunchServices 0x920e2864 _LSCopySchemesAndHandlerURLs + 156 4 com.apple.MessageFramework 0x00960b2c +[URLifier urlMatchesForString:startIndex:matches:] + 1820 5 com.apple.MessageFramework 0x00960024 +[URLifier urlMatchesForString:] + 348 6 com.apple.mail 0x0004cc44 0x1000 + 310340 7 com.apple.CoreFoundation 0x940159a8 invoking + 168 8 com.apple.CoreFoundation 0x94015230 -[NSInvocation invoke] + 128 9 com.apple.MessageFramework 0x009f49ec -[MonitoredInvocation invoke] + 392 10 com.apple.MessageFramework 0x009f461c -[InvocationQueue _drainQueue] + 656 11 com.apple.Foundation 0x90ad9d84 NSThread__main + 1004 12 libSystem.B.dylib 0x93438f70 _pthread_start + 316

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Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000ce6f7b80 Crashed Thread: 10

Thread 10 Crashed: 0 ...ple.CoreServices.CarbonCore 0x93acd610 CSStoreGetUnit + 56 1 com.apple.LaunchServices 0x920c55d8 CSStringCopyCFString + 92 2 com.apple.LaunchServices 0x920e2acc CSStringBindingCopyCFStrings + 120 3 com.apple.LaunchServices 0x920e2864 _LSCopySchemesAndHandlerURLs + 156 4 com.apple.MessageFramework 0x00960b2c +[URLifier urlMatchesForString:startIndex:matches:] + 1820 5 com.apple.MessageFramework 0x00960024 +[URLifier urlMatchesForString:] + 348 6 com.apple.mail 0x0004cc44 0x1000 + 310340 7 com.apple.CoreFoundation 0x940159a8 invoking + 168 8 com.apple.CoreFoundation 0x94015230 -[NSInvocation invoke] + 128 9 com.apple.MessageFramework 0x009f49ec -[MonitoredInvocation invoke] + 392 10 com.apple.MessageFramework 0x009f461c -[InvocationQueue _drainQueue] + 656 11 com.apple.Foundation 0x90ad9d84 NSThread__main + 1004 12 libSystem.B.dylib 0x93438f70 _pthread_start + 316