Sorry for the introduced inconvenience.
Currently we implement a new edition of RadDock control with new dock engine and new simple API to control states of Dock windows. With new RadDock you can control all AutoHide, Floating, Dock states (Size, Location, AutoHide Pos, etc.) and this changes will be saved/restored correctly.
The new edition of RadDock will be delay for Q2 2009, however soon after Q1 2009 we will introduce Beta version. Do not hesitate to write me back if you have further questions.
the Telerik team