Erm/Nightstorm1, I think I identified the problem. Both of you were using the Windows SideShow capability with the "Bars" display style. Running the gadget using the files you sent me, but disabling the SideShow option seems to prevent the leak. This make sense that no users have mentioned the problem, as I'm sure very few people use SideShow. The SideShow code does not execute at all if it is disabled, so this problem does not exist using just the sidebar gadget itself. Removing the prefWindow_#.json file and letting the gadget recreated it causes you to get the default settings, in which case SideShow is disabled. Would you mind enabling the SideShow option again and see if the leak reappears? Then disable it again to see if it goes away. If you can reproduce, please try all 3 display styles and let me know those results as well. Also, what SideShow devices are you using? In the meantime, I'll examine the code to track the problem down, as well as try version 2.2 to see if the problem existed there as well. I do not recall changing the SideShow code in 2.3, but will double check. Vomit, you've been running SideShow for a long time now. Ever see the memory usage issue mentioned above? Have you upgraded to 2.3 and are still running your SideShow device?