gecko regressions; debug build of gecko?

[Dan Kegel]

I've been doing some random qa of popular apps lately, and
think I've found some regressions caused by the gecko update:
http://bugs.winehq.org/show_bug.cgi?id=16869 - Sketchup 7 crashes when
bringing up 3d Warehouse
http://bugs.winehq.org/show_bug.cgi?id=16892 - Yahoo Messenger 8.1
crashes after it puts up the instant message window

Hmm, can we have a debug version of the gecko download
so we can give more useful backtraces?