Please, note that the RadToolTipManager and the RadToolTip are not the same control - the OnClientResponseEnd event is used and implemented only for a RadToolTipManager and thus I cannot see how it worked in the case of Rachid since he is using a separate RadToolTip which does not have such an event except for in case he has switched to using the manager. To better understand the functional differences between the two controls and choose which fits better your needs, please examine the following demo:
As to the particular problem with the right border, we have found and fixed two problems with which are as follows:
1) FIX: The right border of the tooltip is not visible while the content is being loaded on demand /this means that the RadToolTipManager is used/. This fix was released Q1 2010 SP1 as listed below:
This being said, if you have explicit and enough big width set and you are using the mentioned version everything should work fine.
2) FIX: When ContentScrolling is different than Default, the right border of the RadToolTip is not shown - this is about a separate RadToolTip and it is exactly the case Rachid describe. This problem is also now fixed and the fix will be available in the next internal build.
I hope that the provided explanations and information are helpful, in case you reproduce the issue in cases different than the above, pp,ease share fully runnable reproduction code and we will examine the setup and we will do our best to help.
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