If you are in the middle of a wiggle and you press the "R" to release some bands foldit crashes a fair bit of the time. It seems to be a context sensitive bug. In come contexts I'll go for a while without crashing and other contexts it'll crash every time.
It's a move that I use a lot.
Several other people have mentioned this. Does it happen just when you press R on the keyboard, or even when you click the Remove Bands button in the actions menu?
"hit-R-while-wiggle-crash" log.txt:
—snip—
ERROR: constraints.size() == constraint_geoms.size()
ERROR:: Exit from: ....\src\interactive\pose_view\ExtraPoseInfoGeom.cc line: 725
(OS: WinXP Home SP3)
Setting type. Thanks for the report.