GlassPanel memory leak

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What version of gwt and gwt-incubator are you using?
1.7.1
What OS and browser are you using?
WinXP,IE8
Do you see this error in hosted mode, web mode, or both?
Both.
(If possible, please include a test case that shows the problem)
A single method with the following code:
GlassPanel glassPanel = new GlassPanel(true);
RootPanel.get().add(glassPanel, 0, 0);
RootPanel.get().remove(glassPanel);

Hopefully using the test case you have generously provided, what steps will 
reproduce the problem?


What is the expected output? What do you see instead?
I expect the memory usage back to the state before executing the method. What I 
see is there are more than 5M memory not reclaimed. I observed the memory usage 
by Task Manager.

Workaround if you have one:

Please provide any additional information below,  and thank you for taking the 
time and effort to report this issue, as good issue reports are critical for 
our quest to make GWT's new widgets and libraries shine.

Original issue reported on code.google.com by [email protected] on 10 Sep 2010 at 10:17