Thank you for your post.
I have forwarded your post along with the screen shot to our Development and Testing departments for review. When I receive any feedback, I will let you know.
Testing has confirmed that center aligned tabs are not supported at this time in WebDirect. This is documented at the bottom of page 14 of the WebDirect Guide:
"FileMaker WebDirect offers limited text styles. Rich text, highlighting, paragraph text styles, and tab stops are not supported."
I recommend you also enter this information into our Feature Requests web form at:
The entries into this web form populate a database file hosted by Development and Product Management where each entry is discussed and considered for inclusion in a future release.
Here's an update: I found this bug with Popover text not justifying properly in WebDirect: left and right justification worked fine, but center justification always appeared right justified in WebDirect, regardless of browser or platform used.
I tried various workarounds such as different fonts, styles, padding, etc., but nothing solved the problem. However, when I switched the theme from my own (I had used Classic as the base for my customized style sheet) to Enlightened, everything justified correctly. It appears that Classic is the problem.