E.g. in navigation lists ala 'suckerfish', there occures some odd behaviour when some :before attributes are involved (see testcase): When hovering links in nested ULs the parent LI wrap in a second line behind the created content of the :before attribute.
Created attachment 9431 [details] Reduced testcase to show the hover bug
I think this could use even further reduction!
Created attachment 9432 [details] Even more reduced testcase
Fixed in TOT, probably by <http://trac.webkit.org/projects/webkit/changeset/21199>.