Snow Leopard crashes : Safari, Address ...

I write with a problem that appeared with no warning on Sunday after, I believe, the latest iTunes update. The gist is that I can no longer run Safari, Address Book, and TextEdit. Also, other OS app (such as System Preferences) crash regularly. The problem is solid and repeatable. Here is a snippet of a typical Safari crash:

Process: Safari 2881
Path: /Applications/Safari.app/Contents/MacOS/Safari
Identifier: com.apple.Safari
Version: 4.0.3 (6531.9)
Build Info: WebBrowser-65310900~1
Code Type: X86-64 (Native)
Parent Process: launchd 152

Date/Time: 2009-11-02 12:40:34.928 -0800
OS Version: Mac OS X 10.6.1 (10B504)
Report Version: 6

Interval Since Last Report: 4557 sec
Crashes Since Last Report: 296
Per-App Interval Since Last Report: 12 sec
Per-App Crashes Since Last Report: 1
Anonymous UUID: 7BF1CAC9-329C-4D83-8FE6-12182C3178A6

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000004
Crashed Thread: 10 Safari: HistoryTextCache caching

... here is what thread 10 looks like:

Thread 10 Crashed: Safari: HistoryTextCache caching
0 libicucore.A.dylib 0x00007fff82a90fa9 icu::RuleBasedTokenizer::init() 43
1 libicucore.A.dylib 0x00007fff82a90e99 urbtok_openBinaryRulesNoCopy 77
2 com.apple.CoreFoundation 0x00007fff812eddbf CFStringTokenizerCreate 399
3 com.apple.SearchKit 0x00007fff820b915e IADefaultTextAnalysisCreateTokenizerNew 2930
4 com.apple.SearchKit 0x00007fff820e563f TermIndex::DefaultInvertDocumentToUpdateSet(OpaqueIATextAnalysisRef*, IADoc*, OpaqueIATextStreamRef*, unsigned int*) 271
5 com.apple.SearchKit 0x00007fff820b815a TermIndex::AddDocInternal(IADoc*, unsigned int, OpaqueIATextStreamRef*) 276
6 com.apple.SearchKit 0x00007fff820b5c99 TIAIndex::Add(OpaqueIADocKeyRef*, OpaqueIATextStreamRef*, unsigned char) 307
7 com.apple.SearchKit 0x00007fff820b5aab IAIndexAddDocWithTextStream 144
8 com.apple.SearchKit 0x00007fff820b5919 SKIndexAddDocumentWithText 215
9 com.apple.Safari 0x0000000100048709 0x100000000 296713
10 com.apple.Safari 0x00000001000485f3 0x100000000 296435
11 com.apple.Foundation 0x00007fff86bc6f65 __NSThread__main__ 1429
12 libSystem.B.dylib 0x00007fff819c6f66 _pthread_start 331
13 libSystem.B.dylib 0x00007fff819c6e19 thread_start 13

Other apps will run, but not if I try to access one of the troubled ones : for example, if I try to use my Address Book within Mail, mail will crash.

I have tried many of the suggestions posted elsewhere: rerunning the 10.6.1 update, uninstalling and reinstalling Flash, deleting files per the suggestion of users who have found that helpful, running fix privileges many times, and so on.

I will be grateful to learn if others have experienced these problems, if they have found ways to fix them, or if the experts listening might have some ideas.

Thanks.

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