User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040614 Firefox/0.8 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040614 Firefox/0.8 Firefox creates duplicates of all the toolbar buttons and location/search boxes when the theme is changed back and forth. (So you're left with two back buttons, two forwards.. and it's ratherly troublesome to remove.) There are specific conditions which this bug occurs, I've only found one that works every time. Reproducible: Always Steps to Reproduce: 1. Spawn a brand new mozilla firefox instance. 2. Open a new window, which at this point you should have two windows. 3. On the second window (not tested on the first) go to any website, like this one. 4. Now select Tools/Themes. 5. Change to the modern theme 6. Change back to default 7. Repeat steps 5 and 6. 8. Repeat either step 5 or 6 to create more duplicates if desired (naturally you can't repeat step 5 if you just performed it.) Actual Results: You should notice that the toolbar buttons have duplicated! There are now two back buttons, forward buttons, locations, etc. If you've performed step 8, there should be three, etc. Expected Results: Nothing. For me, this occurs with firefox default 2.0 and firefoxmodern 0.71 with both firefox 0.8 and firefox 0.9. Not tested on other themes or browsers.
despite what the user-agent says, firefox (help/about) reports that it's running version 0.9.
*** This bug has been marked as a duplicate of 226791 ***