I just purchased a DirecTV HR10-250 HD PVR and have it going into my 990 DVI 2 input using an HDMI-DVI cable, and an Oppo Digital OPDV971H DVD player plugged into the DVI 1 input of my 990. The DVI output from the 990 goes to a Sony VPL-HS20 front projector. I have no issues sending an HD signal, actually 720p, from either of these devices through the 990. I can switch between them, or back and forth into standard def with no video problems. It all just seems to be working properly.
The only issue that I have using the video switching in the 990 is when there is a signal coming in from a source on either an S-Video or composite cable. When the 990 upconverts this to output it through the component video, the colors get washed out. I have tried three different input devices, multiple cable variations, and even two different display devices, a 36" Sony CRT SD and the Sony HD projector. The picture always ends up washed out. I don't think that there is an issue with a component input signal having its color washed out when the signal leaves the 990. But since I purchased the DTV HR10-250, the only composite in is from a very seldom used VCR, so it is less of an issue.
Jeff
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HT: Outlaw 975/7125 | Sony 55" SXRD | Roku Ultra | Sony BDP-S790 | Mirage OMD-15 (fronts) and Prestige 4 + Center Channel | Outlaw LFM-2
LR: ARC Reference 1 | Emotiva XPR-2 | Music Hall MMF2.2 | Oppo BDP-83SE | Polk XRt12 XM Receiver | Emotiva XDA-1 DAC | Sony HAP-S1 (digital audio player) | Sansui TU-217 Tuner | Magnepan 3.6R w/Mye-Stands | SVS SB-16 sub | BA VR-M90s | Audio Quest 72db speaker cable
Office: Drobo 5N running as PLEX media server
Closet: too many pieces to put all into place, I need more rooms