I am having a problem with my PTL300U Projector when using my RP91 in Progressive Scan Mode. Combing or visible vertical scan lines appear on my screen during movie trailers and scenes with fast action sequences. I've never heard of the RP91 causing motion artifacts with an LCD projector. To make matters worse, Panasonic Tech Support thinks it may be a compatability problem between the RP91 and the 300U. An authorized Panasonic repair shop didn't have any documentation on the 300U, but they said that it might be a problem with the way the DVD was encoded. Any opinions?