By default the rows are not with fixed height, perhaps you have set the height property.
Try to add the following css:
.RadGrid .rgRow td,
.RadGrid .rgAltRow td,
.RadGrid .rgEditRow td,
.RadGrid .rgFooter td,
If this fixes the problem, then find what is the cause of the problem, e.g. where is the grid rows height set in your aplication.
If it doesn't fix the problem, you can use tools such as Firebug for Firefox
or IE Developer Toolbar
. Both are activate with shortcut key F12 and are very useful for debugging CSS-related issues. Try to find which CSS rule overrides the height property and remove it.
the Telerik team
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