Yes, you are right, the bug is fixed with the latest internal build after the Q1 release. However, the change is in the core of the control, and there is no work-around which can be used to overcome this without the upgrade.
Could you please share with us what is stopping you from upgrading?
Just as a note, the upcoming Q2 release is due in June, so if that timeframe is suitable for you, you could directly upgrade to this version.
the Telerik team
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