http://bugs.winehq.org/show_bug.cgi?id=10359
--- Comment #11 from Chris Pick pilo1000@gmail.com 2007-12-23 20:47:35 --- (In reply to comment #10)
The mouse offset problem related to WM (or Steam itself) moving it's window to always be within display. This puts Wine's internal mouse position out of sync with real pointer position. As a work around, you can move Steam window to the middle of the screen. Use [Alt]+mouse to do that (if your WM support this). Ask your distro channel for help using your OS.
[Alt]+mouse doesn't work for me. To clarify, [Alt]+mouse does let me move the screen around, but whenever i let go of the mouse button the window jumps back to its previous position anchored in the upper right hand corner of the screen.
Since the actual position of the cursor is above where steam thinks it is, I can't grab the title bar at the top of the window and so I can't figure out a way to relocate the window.