Note that the creation of a Font is a heavy operation and can lead to memory leaks. It is best to create one font and use it across the application.
I hope this will help you. If you have further questions, I would be glad to help.
Best wishes,
Ivan Petrov
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.