At this point the only version of RadEditor for SharePoint 2010 is the Full ASP.NET AJAX 6.0 beta. We do not intend to release a Lite version of the control. The reason for this is that the Lite version is based on the classic ASP.NET RadEditor and it was discontinued more that two years ago.
Now regarding the the upgrade from MOSS 2007. If you were using previous versions of RadEditor for MOSS the webparts should still be working. However you will not be able use the control via its features in WCM and List scenarios. If in WCM scenario you replaced the original RichHtmlField
filed with RadHtmlField,
you will need to return the original control.
If you uninstall the solution, the only way of getting rid of the error messages is deleting the webparts.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.