Created attachment 560483 [details] 1. before When bookmarks are next to the tabstrip (attachment 1 [details] [diff] [review]) and the tabstrip grows, causing the bookmarks to shrink (attachment 2 [details] [diff] [review]), after the tabstrip shrinks, some bookmarks don't come back (attachment 3 [details] [diff] [review]) although they do after a browser restart. Weird setup, I know.
I forgot to mention, this is on nightly.
I believe this is a duplicate of Bug 603817. The patch I have just attached there goes a long way to fixing it.