I also got lots of similar crashes in Beta5.
But I get some similar crashes in the version I've just downloaded.
Code: c0000005 (Access violation)
Version: 1.0.1 (2008-03-09)
Major: 5
Minor: 1
Build: 2600
SP: 2
Type: 1
Time: 2008-03-09 21:48:53
TTH: H6JE7JFGAHDTABZAJLSO3RRWNEI7VBJ6LAYWMUQ
ntdll!0x7C918FEA: RtlpWaitForCriticalSection
ntdll!0x7C90104B: RtlEnterCriticalSection exceptioninfo.txt