IsMouseOver bugged?

Hi,

I'm playing around with the IsMouseOver property of the UIElement
class... And I experience a really troublesome behavior...

When I move the mouse around rather quickly, some controls keep on
believing that the mouse is still over them... the value of the
property IsMouseOver remains at "True" while the mouse is obviously not
over the control anymore... The only way for the control to "fall back"
on its feet is to receive the mouse within it's bounds once more...

I checked in the code for the IsMouseOver property and noticed that
the IsMouseOver property is read from the CoreFlags... But I cannot
find where the flag is set (to work around this problem)...

My first concern was that the behavior of the IsMouseOver was far
from being "performant"... but I then I remembered the huge performance
hit when running with the debugger... I tried running wihtout the
debugger and was pleased at first to see that responsivness for the
IsMouseOver property was much better.... However, after towing with the
exact same application for a little time, I reproduced the behavior...

While it is much less frequent than with the debugger, the same
behavior still occurs...

Anybody has hints on working around this issue or encountered the
same behavior... Is this a bug (at least already identified)?


Thanks

Marcus