http://bugs.winehq.org/show_bug.cgi?id=16785
--- Comment #21 from Austin English austinenglish@gmail.com 2009-02-06 20:20:45 --- (In reply to comment #19)
Jacek has posted on the wine-devel mailing list that this crash occurs because Gecko can't find the fonts, and the workaround is to copy the contents of the fonts directory in the source into the fonts directory in the build directory.
Tested OK for me, but it's only a temporary workaround for now.
http://www.winehq.org/pipermail/wine-devel/2009-February/072800.html
A patch was put into git today to fix this.