http://bugs.winehq.org/show_bug.cgi?id=12650
--- Comment #4 from Dmitry Timoshkov dmitry@codeweavers.com 2008-07-29 22:09:32 --- This one looks very much like a DIB engine performance bottleneck. Flash creates huge DIB section to draw a huge font (-2048) to simulate anti-aliasing, and then draws the characters pixel by pixel. X11 spends a lot of time copying DIB bits back and forth, and that somehow leads to losing key presses.