Looks like we can't reproduce the issue or there's a problem in the test case provided.
TabPanel icons no longer centered PR3
Using PR3 the bottom tab panel icons are no longer centered.
This happens in Google Chrome, and my Android device.
Notice the two tabpanel icons are left aligned, in pr1 & pr2 they were centered
Screenshot - 12142011 - 07:31:43 PM.jpg
In your TabPanel config specify the following:
perfect, thanks for that