If after adding a new item to a grid with inline edit the save button is double-clicked (e.g. by accident) two new items are added instead of one. Right now, the only way to prevent this seems to be to check if an item is already contained in GridData at the top of the OnCreate-Handler and cancel if necessary. If a unique ID is not available yet (because it is created by the database when saving at the end of the handler) this means every Property has to be compared to check for equality. This is very annoying.
Please add a parameter "DisableWhileBeingHandled" to TelerikButtons and make this the default for the CommandButtons in a Grid. The Buttons should only accept clicks if the previous handling is finished.