Hello Zbigniew Kozłowski,
We have made some good progress on RadRichTextBox for WPF but we are still experiencing issues with some features. Therefore, we have decided to postpone the WPF release a bit. In fact, most of the major functionality regarding RadDocument alone and the format providers is already running. We need more time though to port some UI related features and resolve some platform specific issues. This will allow us to introduce a beta of this product very soon after Q3.
As for copying and pasting, it will work in fact better than in Silverlight due to the access to the system-wide rich text clipboard. This will be available once the official RadRichTextBox for WPF is released.
If you have any other questions, do not hesitate to contact us again.
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