On further investigation it became apparent that the issue you were facing was not related to our components. In light of this new evidence I would suggest that the number of braking changes and the effort involved are less than stipulated in this post.
All the best,
the Telerik team
Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.