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I added NumericTextBox to grid. In all browsers apart from Opera I can increase/decrease value using small arrows. When I move cursor to one of the arrow, cursor doesn't change "icons" in Opera like another browsers.
EDIT:
I have found strange thing. When I change property margin-left in ".t-numerictextbox .t-icon" (telerik.common.min.css), from "-16px" to "-15px" I haven't problems with increase/decrease but arrows don't lie in the same line.
SOLUTION:
I have found solution. It's a little primitive but work:). I override two css styles ".t-numerictextbox .t-arrow-up" and " .t-numerictextbox .t-arrow-down". To first one I added margin-left:-15px and to second margin-right:1px.