Windows XP
Intermittent assertion during 375399-1.html ("ASSERTION: reacquiring already acquired resource: 'mDDEntry->mAcquisitionContext == CallStack::kNone', file e:/builds/moz2_slave/m-cen-w32-dbg/build/obj-firefox/xpcom/build/BlockingResourceBase.cpp, line 141"
XPCOM