A great many of the problems with CXG and LOTRO center upon Graphics issues. Please keep in mind the following:
Wine tells the Turbine Client what "graphics hardware" it has and what kind of functionality it supports.
(I.e. what graphics hardware WINE is emulating].
WINE (and by extension CXG) does not support DirectX 10 or 11.
This same "problem" exists with Parallels, or any other virtual "windows machine."
(Bootcamp IS different.)
This month's (May 2011) MacLife magazine has an article on the issue....
http://www.maclife.com/article/features/how_master_windows_virtualization_your_mac?page=0,3
Scroll down to the section: "Look before you leap." ...
"However, because a virtualized environment is standalone and
separate from your Mac, it doesn’t engage the GPUs like OS X will.
In Boot Camp, Windows utilizes the discrete graphics card when
it’s running graphics-heavy processes. Other virtualization
software usually creates fake “hardware” that the virtualized
Windows recognizes as actually existing. For example, VMWare creates
a fake GPU called an SVGA device, which is actually tapping into the
discrete GPU of the MacBook"