AKICILJ: Firefox 4 tab and menu transparency

Just updated to FF 4 and like it for the most part except the way the tabs and bookmark bar items are all transparent. It makes it rather hard to see the ones on the far right especially, where the various themes tend to put their icons or images. I've tried a few different themes, and the only one I've found that fixes it (by taking away all transparency), I just found ugly.

Are there any addons or tweaks that will reduce the transparency? Or, do you know of any nice-looking themes that let the buttons etc. be solid?