While trying to upload a 791 solution to 795 I got this interesting issue. I have reloaded the soln into 795 and saved it from there, that upload worked fine. Still an odd issue.

Here is the log from a peculiar crash, seemingly involving 'colinear residues'. This is a new bug to me.
Windows says:

Problem signature:
Problem Event Name: APPCRASH
Application Name: Foldit.exe
Application Version: 0.0.0.0
Application Timestamp: 4e761405
Fault Module Name: game_library.dll
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 52335260
Exception Code: 80000003
Exception Offset: 001cbb66
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1043
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

The log says:

ScorePanel new session
Sending SOPs:
Operation ID: SetGameLog Correlation ID: 110914
Operation ID: SetGameLog Correlation ID: 110915

Operation ID: ClientInformation Correlation ID: 110916
SOP Success Operation ID: SetGameLog Correlation ID: 110914
SOP Success Operation ID: SetGameLog Correlation ID: 110915
Error reading upload_tmp_994182_1357438554.ir_solution; expected SOLN, got .

Error reading upload_tmp_994182_1357438554.ir_solution; expected SOLN, got .

**************************************************
WARNING: residue 82 atom 4 stub atoms nearly colinear at 175.817 degrees
**************************************************
**************************************************
WARNING: residue 83 atom 10 stub atoms nearly colinear at 178.049 degrees
**************************************************
**************************************************
WARNING: residue 165 atom 4 stub atoms nearly colinear at 178.444 degrees
**************************************************

UNHANDLED EXCEPTION
1: library_main +1878881 bytes (no line)
2: library_main +1281483 bytes (no line)
3: library_main +1446467 bytes (no line)
4: library_main +1076387 bytes (no line)
5: library_main +3362404 bytes (no line)
6: library_main +3388910 bytes (no line)
7: library_main +3359788 bytes (no line)
8: library_main +4094532 bytes (no line)
9: library_main +4097878 bytes (no line)
10: library_main +4333342 bytes (no line)
11: library_main +4321316 bytes (no line)
12: library_main +6087401 bytes (no line)
13: library_main +4320521 bytes (no line)
14: library_main +6093956 bytes (no line)
15: library_main +6096263 bytes (no line)
16: gapfnScSendMessage +818 bytes (no line)
17: GetThreadDesktop +215 bytes (no line)
18: GetClientRect +197 bytes (no line)
19: CallWindowProcW +27 bytes (no line)
20: wglSwapBuffers +730 bytes (no line)
21: gapfnScSendMessage +818 bytes (no line)
22: GetThreadDesktop +215 bytes (no line)
23: CharPrevW +312 bytes (no line)
24: DispatchMessageA +15 bytes (no line)
25: library_main +6101667 bytes (no line)
26: library_main +3832499 bytes (no line)
27: library_main +33303 bytes (no line)
28: library_main +29 bytes (no line)
29: no symbol (no line)
30: no symbol (no line)
31: no symbol (no line)
32: BaseThreadInitThunk +18 bytes (no line)
33: RtlInitializeExceptionChain +99 bytes (no line)
34: RtlInitializeExceptionChain +54 bytes (no line)
onGraph