I'm using Eclipse 3.2M5a, Mylar 0.4.10, and VSS plugin
The VSS plugin "Checked out files" view seems to cause
excessive refresh requests to the package explorer.
This manifests itself especially when using Mylar,
since it causes elements in the package explorer that
have been bolded by Mylar to blink on and off
(bold/unbold ad infinitum).
I did not see this problem before using Mylar, so I
can't confirm that Mylar has no part in this problem.
(Eclipse platform) for further details.