In the past two days, I've gotten two segfaults from mongod. I'm attaching the stack dumps from the mongod log file.

This is on a development machine which has been stable for quite a while. I believe the last database maintenance I did was to install 2.2.0, which looks like it must have been the end of August, and I've been running fine since then.

I was planning to upgrade to 2.2.2 soon, but I'll hold off on that for the moment.