http://bugs.winehq.org/show_bug.cgi?id=13718
--- Comment #7 from Dan grinnz@gmail.com 2008-08-17 02:52:43 --- I have not gotten this issue since I have begun following this advice from Ben in the comments section for the CoH page:
"I get this if I don't click on the small loading bar immediately after it appears, as if there was some sort of focus issue going on."
Not sure if clicking is necessary, sometimes I move my mouse over the loading bar and it disappears (as if going under the bar), then I move it back over again and it shows up above it. Other times it shows up initially.
If I do get the rubberbanding issue after doing this I will followup here but so far it looks like there is some relation (and a workaround) here.