Hi, I also, like and use the CWP plasmoid, but have never had that problem. Have been using it since Mint 6 kde.
Have you tried changing the login/logout settings ? (to remember previous session)
Are you using any compiz settings or the built in desktop effects that would interfere with the Plasma Desktop ??
Another thing to try, is by right-clicking the desktop, and enabling Lock Widgets.
Richy
