http://bugs.winehq.org/show_bug.cgi?id=22731
--- Comment #6 from Ole Rasmussen olerass@gmail.com 2010-05-27 07:30:11 --- Bug is present with both Catalyst 10.4 and 10.5 with Wine 1.1.44. Here is a video showing the bug. The scroll/pan speed is set to its lowest (takes approx 5-6 seconds to scroll from one side of the map to the other when going left or up which is the correct speed, but down and right is noticeably faster as you can see).
The bug is NOT present when scrolling using the keyboard arrows - only when using the mouse.
Video: http://tinypic.com/player.php?v=2zswgon&s=6