I have a main grid that has row details. In the detail I load multiple tabs, each tab with a grid - all of the scroll, but for one tab I have plain html with css overflow. When the detail is expanded the main grid uses vscroll to lock its position to the top and only allow the detail to scroll. For the tab that uses only HTML the vscroll event fires immediately, which makes me think that the main grid thinks that it is its content. Any ideas on how this issue can be resolved?