I've had numerous crashes with 3.1.0 over the past 24 hours across 3 separate clusters. I need to babysit this one too much, so it has turned out to be impractical for me. This is the 32-bit Windows version running on both 32-bit and 64-bit Win7 instances.
I've since reverted to the previous experimental version bfgminer-w32-320e7ed (reports itself as 3.0.99) which is much more stable.
Yes, my 32bit version running on win7 has crashed about 3 times in the last 24 hours. I couldn't get the 64bit version to run.