Windows 7 x64, current avast version.
I've twice crashed out of a build which involved constructing and executing a lot of small programs,
during which the real time "examining for virus" notifictions pop up many times, sometimes with
several of the pop-ups visible at the same time. The symptom is a sudden blue screen of death,
not at exactly the same point in the build.
Turning off real-time file examination allows the process to complete without crashing.
I can provide more information if anyone cares. (or you could turn the page..)