It's a very annoying bug in my eyes. It testet it with Safari Beta 3 (3.0.2), WebKit r246688 and earlier webkit versions. Webkit, and now Safari 3, matchs the color of a dropdown menu with the color of the page. But there is a very annoying defect in drawing the dropdown menus. It took a screenshot, then you can see what I mean: http://sk8t.sk.funpic.de/safari.jpg The "shine" on the bottom of the dropdown menu is too short. I think that should be matched.
This is a known issue but I do not think it is in Bugzilla yet.
Created attachment 15718 [details] Screenshot from Comment #0