Phil, Alot of users of the TileProxy utility are experiencing thisin SP1:During the initial load, TP feeds FSX tiles in the mid tohigh 100's of tiles per second (I've seen 850+ on my system).Once loaded, the scenery is crisp and clear, and after the firstminute or so of flying, even in a fps-friendly craft like the ultralite,the scenery tiles stop "snapping" to the clearest image, and scenery updating in the sim seems to stop permanently until ascenery refresh is manually triggered, then the process startsall over again. At that moment, TP is only reporting 20-30 tiles per second beingfed to FSX, and as I understand it, TP feeds FSX the tiles as itrequests them. I've even paused and walked away for 30 minutes andthe tiles never update. It's almost like FSX stops asking for tiles. To make sure this isn't something with TP itself, I've flown circlesaround an area (KORH) and after an hour, TP stopped downloading newtiles, so it has the whole area. I then turned off TP altogether andrestarted the sim, and the same exact problem happend.. tiles stoppedloading "crisp" and the blurries don't recover until a manual sceneryrefresh. So to answer, yes it is happening to photo scenery, and no, it doesnot seem to recover on its own, even when paused. When I downgrade to RTM, the problem goes away. I should mention, I've tried all the tweaks posted here and inyour blog, have FPS locked at 20 all the time and I stay there,hardly ever dropping below 20. I've even tried non-standard tweakslike setting the sim to 640x480 :) with no change.