Hi dan harvey,
Thank you for the question.
As we are not able to reproduce the issue locally, we cannot provide you with a tested and appropriate workaround. We are still investigating the issue which MP has, namely mouseover paint issues when the machine where RadControls are running is not rebooted for a long period of time. Most of the clients that had such issues, however, actually had issues with their display adapters, because their painting issues were addressed once they updated their video drivers. Therefore, I would strongly recommend you to try updating your video drivers if you have not done it so far.
Best wishes,
Nikolay
the Telerik team
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