OK, I upgraded to the latest version of LOTRO, Mirkwood. However, since the upgrade I have been having a random issue. At some points during gameplay, my graphics will show a stray random break in the rendering like a line coming from a character going in odd directions. Then at some point the entire graphics display will become distored in random triangles much like a broken LCD screen. This will in turn spread to the entire GUI of the OS.

Specs:

Windows 7 64 bit
Geforce 8800GT - Latest Drivers
Core 2 Duo
4GB DDR2 - Tested free of errors
LOTRO, Windowed at max settings and resolution.