Thanks for the excellent bug report. I'm going to pass it on to the libMocha component. I can't promise it'll be fixed, because it looks like it's on the mozilla 'classic' codebase - current development efforts are being focused on the nglayout/xpfe codebase. Brendan - you're listed as non-owner of this module. Any suggestions?
This bug is against the old layout engine, really. It's unlikely to recur in the brave new world. I'm marking it REMIND and reassigning it to vidur, who may just want to close it. /be
REMIND is deprecated per bug 35839.
VERIFIED, MozillaClassic is dead.