Sheesh! After waiting anxiously all day for UPS to arrive, I rushed upstairs to install Carrara. Slight problem, though. The serial number they gave me is invalid and I can't get anywhere on the installation. I called MC at 4:45 p.m. and was told that I had called after business hours (5:00 p.m.) I have typed in the serial number they gave me a dozen or more times and it's a no go. Was curious if anyone else has had this problem. Marybeth