Just a heads up to anyone running from git, I discovered this morning we have another heap corruption problem. It seems that our leak dumper was hindering the mscrt checks somehow, and I have had leak dumping turned on for a long time now (until this morning...), so it may not necessarily be something very new.
This could be causing weirdness or crashing depending on the build, I don't have the time to investigate properly just now, but hopefully will get a chance to track it down tonight.