ok, after 2 hours of work, i gave up useing DD_roundies,
it just doesn't work well with combination with the Tabs UI.
Then I tried another plugin which I know should work, and tested on:
IE6, IE7, FF3
all works well!
I've also modified your CSS.
put the whole "Corner radius" section on comment. no need for that.
Hope this suits your needs :)
vsync
2009-05-17 21:05:20