GridPanel doesn't like a Window with ComboBoxes, all rows go crazy

[paul-2011]

Hi guys, I'm experiencing a really annoying issue, I have a page with a GridPanel, very simple, working fine with paging, if I add a Window to the page the GridPanel still works fine, now, if I add a ComboBox to the Window (inside Panel items), the grid will start skipping rows, some rows will be blank, the more ComboBoxes I add to the Window the more rows will become blank, I can paginate the GridPanel but it still won't show any data, deleting the ComboBoxes fixes the problem, what could be happening here?
I appreciate any ideas,
Thanks,
Paul

[paul-2011]

Actually one of the ComboBoxes had the same Store ID as the GridPanel, oooops!
Case closed.