Cursor position offset when game is windowed

To open I'll say that I'm running PoE under linux mint with wine/PlayOnLinux. I expect any answer to be “not our problem” but just in case any one cares I'll report.

Due to unrelated bugs with the ati drivers under linux and compatibility with switching to background programs (e.x. voice chat) and full screen games I have to run the game as windowed. When the game is running windowed there is an offset in the cursor position and where the game considers the pointer to be. I've never noticed this behavior with other games and assorted programs. See me highlighting the login button:
http://i.imgur.com/8KDtWhJ.jpg
http://i.imgur.com/37z8iua.jpg

This seems to be an issue with importing the height of the top menu bar. It does occur with the menu bars suppressed, as I would be playing the game, but the amount seems to differ.

A workaround which I did not believe would work but in fact does is to manually change the resolution in the configuration ini by reducing the vertical resolution by half the top menu bar. I'm playing it at 1920x1068 (1080p – 25/2 vertical). This leaves a glitchy stripe along the bottom but the mouse location is accurate.

With workaround (and suppressed menus, which I forgot in the above screen shots; still windowed)
http://i.imgur.com/hZzXKft.jpg

+1 fix worked for me as well.

My windowed res is 1600 x 1050 but in the config if I make it 1600 x 1000 the mouse aligns properly.