The solution in bug 449492 makes things worse. Let's back it out, until we can come up with a better solution in bug 511742.
Created attachment 395868 [details] [diff] [review] patch, v1 This reverts that change Chris mentioned in comment 0.
Comment on attachment 395868 [details] [diff] [review] patch, v1 Remember to reopen the other bug.
No need to reopen the other bug, Chris filed bug 511742. I also talked to James and we concluded the markup is too complicated for bug 511742 to be fixed for this milestone. r49766 / r49767
Verified reverted; problem's back on http://support-stage.mozilla.org/en-US/kb/Dynamic+Content :-(