See attachment 14136 [details] in bug 13443. Patch forthcoming.
Created attachment 14144 [details] More clipping
Comment on attachment 14144 [details] More clipping Need to handle hit testing too.
Comment on attachment 14144 [details] More clipping Feel free to turn my - into a + if hit testing isn't broken. r=me.
Comment on attachment 14144 [details] More clipping (In reply to comment #3) > Feel free to turn my - into a + if hit testing isn't broken. It isn't. r=you :-)
Landed in r21069.