Ever since I upgraded to Snow Leopard, OmniGraffle has been slow to start up. The behavior is the same after upgrading to 5.2. The inspectors actually show up almost immediately, but then the beach ball appears and spins for about 20 seconds before the "Choose a template for your document" dialog appears.

I grabbed a sample of the process via Activity Monitor, and the profile shows that all the time is being spent within CUPSPrinter::GetPPD. I'm guessing that it's looking up printer capabilities in order to determine supported paper sizes.

Are other folks seeing this same phenomenon, or is it just me?