Thats because it still remembers the theme you were using from Firefox 5. Just go to tools>add-ons>Appearances and then you see all the themes you have downloaded. Just enable the one that says DEFAULT 5. This is not really a problem, is mostly playing around with the themes....

To the best of my knowledge the Default themes for Fx 4, 5 and 6 are the same.

Is there something you are expecting to see or not to see?

I want to see many changes in my current browser, Just like tool bar's default theme as its different from Firefox 4 or may be 3.

No I also checked this, from Add-ons. But it's still showing old version's default theme.

I don't usually use the default theme but before and after I enabled it, the one default entry in Appearance just says "Default 6.0".

Its okay, My this problem is not properly solved thanks for help. Unfortunately I'll use this old default theme as its on Fx 3. :(

I checked and set that theme "default 6.0" again and again. but showing older one as i used at Fx 3.

Looks like I can't help. A lot of users would be happy with your situation - I can't really think of anything you are missing out on. Be alert, though, for any other problems.

You are definitely using the default theme? You didn't at an earlier time work through something like this -

http://www.computertechtips.net/64/make-firefox-4-look-like-ff-3-6/ ?

If the answers are yes and no, there is no need for a reply. Anyway Fx7 will be along shortly.

I've never seen this problem. Someone may come by with the definitive answer.