Dafydd: Not yet, but it is on my list of laptop upgrades to do. But like I said before (I think) I've been using PD10/11 on 4Gb of RAM for a very long while without any issues, it's only recently it's started happening. And the RAM is working fine, as I recently performed a test on it. I still don't know where the 2Gb of video RAM came from. When I posted those specs, I was using an older video card with 512Mb of RAM (in SLi). I've since upgraded to a video card with 1Gb RAM (in SLi).. so where 2Gb of video memory came from I have no idea. Dell XPS M1730
Windows 7 Ultimate x64
Intel Core2Duo (T9500) @ 2.60GHz
nVidia 9800m GTX SLi x2, 1GbMb per core, 2Gb SLi
4Gb DDR2 (PC6400) RAM
750Gb Western Digital HDD
PD12 12.0.3403.0