Breadcrumbs go over the top bookmarks
The following issue with the website theme was reported to the mailing list:
"On smaller screens, the breadcrumbs go over the top bookmarks, especially on pages with longer titles. This may be because of the absolute positioning. I think you could use display: table-cell to fix this (but that won't work in IE8 and below, and I am guessing might not work in Iceweasel 3.5)."