Unfortunately the Comments
functionality of RadEditor have not been tested under SharePoint.
I tried to enable it, but there were some errors. So I can tell that currently Comments can not be used in RadEditor for MOSS. I logged this bug in our bug-tracking system so we will work on fixing this.
Here you can find the PITS Issue: Public URL
. In it you can follow the status of the bug.
All the best,
the Telerik team
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