Illustrator CS5.1 crashes when saving on Mountain Lion

Question

I recently upgraded to mountain lion and Illustrator crashes each time I try to save a file. I've tried validating all fonts in Fontbook, which have passed and repairing permissions on my systema and also deleting the Illustrator preferences file, but the crash still happens. Any ideas or help would be appreciated! Here is the first part of the crash report:
Process:         Adobe Illustrator [850]
Path:            /Applications/Adobe Illustrator CS5.1/Adobe Illustrator.app/Contents/MacOS/Adobe Illustrator
Identifier:      com.adobe.illustrator
Version:         39 (15.1.0)
Code Type:       X86 (Native)
Parent Process:  launchd [171]
User ID:         501
Date/Time:       2013-01-25 15:27:44.943 +0000
OS Version:      Mac OS X 10.8.2 (12C60)
Report Version:  10
Interval Since Last Report:          327273 sec
Crashes Since Last Report:           9
Per-App Interval Since Last Report:  3163 sec
Per-App Crashes Since Last Report:   9
Anonymous UUID:                      FECDEDCD-904A-86AE-44CB-C034B11E1DE9
Crashed Thread:  0  Dispatch queue: com.apple.main-thread
Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.CoreFoundation                0x94558882 __CFBasicHashDeallocate + 18
1   com.apple.CoreFoundation                0x94554c3a CFRelease + 938
2   com.apple.desktopservices               0x953a88b7 TAutoRef<void const*, TRetainReleasePolicy<void const*> >::~TAutoRef() + 23
3   com.apple.desktopservices               0x953d70be TNode::CopyQueryDictionaries(__CFDictionary const**, __CFDictionary const**) + 822

Answer 1

I tried ringing Adobe and after creating a new user account on my system and logging into that, I was then able to use illustrator. This is okay but not ideal as I don't want to have to switch between accounts each time I want to access my files. Any ideas on how to solve this? I have tried uninstalling and deleting preference files again but still the same problem...?