Interesting... So, I had Win 98 SE on one HD, and Win XP Pro on another, in a dual boot, and I have an Nvidia GeForce FX 5700 video card with 256 MB video RAM (1.5 GB system RAM). Anyway, Vue 4's Open GL with the 4.22 update patch doesn't work right under either Win 98 SE or XP Pro... But yesterday I decided I wanted to upgrade my Win 98 to Win 2000 Pro, so I went to Staples and bought Win 2000 Upgrade edition (Had to reformat everything because Win 2K wouldn't allow itself to install with XP there, even when I removed my SATA Drive which has XP on it, but that's a whole other story...). Anyhow, I succeeded in installing Win 2000 Pro, and installed Vue 4 on it and before even updating to 4.22 I tried the Open GL, and it worked...PERFECTLY (!). For a while, that is. I used it alot and all seemed to be well...until I switched from render-to-main view mode into render-to-screen mode, and then all went wrong. Switching back to main view didn't fix it, neither did installing the 4.22 patch. Not complaining, of course, I just find it strange. Anyone else here using Vue 4 Open GL on Win 2K?