We'll need a bit more information in order to solve this issue properly.
1) Can you confirm that you are indeed using 2011.2.712 controls, as specified in the thread description?
2) In which browsers are you testing in? Does it happen in other browsers as well?
3) What do you mean by "built in tooltip"? Is it the title attribute or the RadToolTip? If it's the RadToolTip, which skin is it, as I couldn't match it to our existing skins?
If the by "built in tooltip " you mean the generated e.g. from the title attribute, that can not be controlled, as it's a browser feature.
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