Not quite sure why the wiki for installing 0810 via DVD hasn't been updated. The link is here: http://wiki.linuxmce.org/index.php/Installing_0810
Under the DVD Installation, it states that you simply double click on the LinuxMCE icon when finished with the previous items. This hasn't work for me through ~4 x attempts and I've found posts from others that this doesn't work (experiencing exactly what I've experienced). This may work for some, but certainly not for all. As mentioned, the errors I get are exactly like others I've found. Not sure if it's Video card related or other, but if this method is restricted to specific scenarios, then it should be noted to save countless hours rebuilding.
I've only been successful (even then when not working through packages.medibuntu.org availability issues) when following instructions as if it were an addition to a Kubuntu install. That is, running the ./pre-install-from-repo.sh, ./linuxmce-install.sh and ./post-install.sh. Only then do I have a functioning install that I can post questions for and not be told I need to follow the procedure outlined in the wiki above. There are a number of posts suggesting that running the 3 x script route is the only way to go, as well as the only way to get meaningful support.
I know 810 is beta, and automating the install is the holy grail. However, if something so basic doesn't work, it would be nice if it was removed or at least caveated so people don't waste their time. I'd like to spend time with my specific setup focusing on issues or successes not related to something as basic as an install.
That said, thanks to the developers, guru's and poster keeping this alive.