Reproduction: 1. Check out trunk, build 2. make -C mailnews xpcshell-tests Actual result: 3 gloda tests fail. Expected result: All tests pass. bienvenu saw the same on Windows, and first thought it was my bug.
I tested with comm-central b80103b363ea, Wed Feb 17 01:58:48 2010 +0100 and 414c8137e925 Mon Feb 08 21:37:41 2010 +0000 , so the problem exists/existed for at least 9 days.