Issue seems to happen with RadGrid with Bootstrap Skin, RenderMode Lightweight when RequireFieldValidator is enabled in combination with Batch Editing.
Unexpected look (Bootstrap skin):
Other skins seems to have it right.
Expected look (Default skin):
Expected look (Silk skin):
Thank you for taking the time reporting this issue.
After some investigation, we have found that there is a CSS style applied specifically in the Bootstrap Skin that sets the batchEdit container's margin to go out of boundaries with about 9px top and bottom:
Workaround is to ensure margins are re-set to 0;
<style type="text/css">
html body .RadGrid_Bootstrap .rgBatchContainer {
margin: 0;
}
</style>
Please excuse us for any inconvenience this may have caused.