Fix for ticket #3575

The ticket details a problem with Flash on jQuery which is fixed by
changing the last line of "$.ui.mouse._mouseUp" to "return true"
instead of "return false"
There is no change in the output of the visual or unit tests after
this change is applied (I tested version 1.7.1)
I would like to check this fix in. Can anybody tell me how I should go
about doing that ?
thanks,
Vipul