yes, i was just upset since netscape 9's theme is available for both mac and windows version of firefox, but not for linux version. so i installed windows firefox through wine.
its really amazing that the wine project are so nice, much much better than a year ago (u can see i have HoMM 3 and 4 installed-through wine).
like I said in first post, its linux and window fx running at the same time. thats what i felt funny,
the one with blue-green buttons was the Ubuntu one and the other one was the Wine one.
wine emulated apps have system provided titlebar, so they both have red-yellow-green button. u can't tell the difference from there.
especially for firefox, once you choose correct theme(s), it will be very hard to tell which one is windows version, until u pay attention to the form widget inside a webpage (if there is any).