Aperture freezes on print dialog

I've noticed a reproducible problem with printing. When I call up the Print Image command from the File menu, I'm presented with the Aperture print dialog. If I then click on Print, it calls up the print dialog for my Epson Photo Stylus R3000 printer (the latest version 9.04). If I click Print to complete the process, the printing goes through fine. However, if I cancel printing on the last dialog, the first Aperture print dialog is shown and is not dismissed. Problem is, clicking anywhere on it does nothing and there is no way to manually dismiss it. It's unresponsive. Aperture is effectively frozen and has to be force quit. It seems to happen only with the Epson driver. When I tried the same with an HP LaserJet printer, it cancelled fine. Not sure whether it's a bug with Aperture or with the Epson driver, but the R3000 is a printer that should definitely work with Aperture.