Ok, I really tried, but after working with Firefox 2.0 for a few days I still don’t like the Close buttons on the tabs (I know IE7 has them, too, but that doesn’t make things more usable for me personally). Fortunately it’s simple to go back to 1.5 style:
about:configin the address bar
- Restart Firefox
And if you prefer the icons of Firefox 1.5, there’s a theme for you on Mozilla.org.