Here is a test version (may have problems) of Firebird Macqua - for 1.5b skin version only (nightly versions). Toolbar icons were created by Kevin Gerich and are released under GPL. Please inform me of any bugs. Thanks.
Well, this is only a test theme - it is rough in some parts. There will be an Official milestone release (Firebird .7) soon that will include the latest skin version. I cannot continue to maintain 2 or 3 skin versions of the same theme.
The next version of this theme will have all new buttons (same but improved quality) and hover states, brightness instead of box drawn around icons to indicate state.
Maybe you should update. I am using: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030823 Mozilla Firebird/0.6.1+ - and i'm quite happy with it.
Just rename your old folder and your profile so you can go back if you want.