Hi Jie Lin,
It's not necessary to upgrade, because you can edit the old template (the one from the 2010.3 version) where we don't use this command, but we advise you to upgrade because we are stopping the support for the old version (that's because the we made a major refactoring on the tileview for the 2011.1 version and most of the problems from 2010.3 are fixed in 2011.1).
If you have more questions feel free to ask.
All the best,
the Telerik team
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