User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b3pre) Gecko/2008011704 Minefield/3.0b3pre Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b3pre) Gecko/2008011704 Minefield/3.0b3pre gtk expander widget is used in bookmarks manager and in quick bookmark adding dialog in location bar. when I hover it using my mouse, arrow has no hover effect. when click it to toggle visibility of its contents, it's not animated like native gtk expander. Reproducible: Always Steps to Reproduce: 1. click star/asterisk icon in location bar 2. click it one more time to open dialog 3. hover the arrow 4. click it Actual Results: expander has no hover indicator and it's not animated Expected Results: everything ok

This can't be fixed with the current infrastructure of XUL trees because a) There is no support of intermediate states or animations b) A frame is not constructed for each expander (I assume for perf reasons) so it is impossible to get the hover state of each individual expander, we will instead get the hover state of the actual treeview. So unless the code for trees undergoes an overhaul, this is unlikely to be fixed for Firefox 3.