http://bugs.winehq.org/show_bug.cgi?id=5941
--- Comment #5 from MagicMan MagicMan07@bluebottle.com 2008-04-17 13:15:14 --- Yes this is still an issue (as of Wine 0.9.59).
The table windows still don't resize correctly with PokerStars. However, the lobby windows have been able to resize for quite some time now.
Currently the only way to get the table windows to resize like they should is to un-check 'allow the window manager to control the windows' in the Graphics tab of winecfg.