I can also play CiV4, Oblivion, Rome Total War, NeverWinter Nights, GTA, Heroes of Might and Magic 3,4, and 5, Fable, Freelancer, Ghost Master, Sid Meier's Pirates, Half-Life 2, Star Wars KoTR, and more, all with no trouble. I use this machine for work sometimes, using a VPN into work with a VNC session, no problems.
I upgraded the drivers for my graphics card, updated the firmware of my router, and verified the Ryzom image, all to no avail.
It has come down to several crashes every night. Any night that I don't crash is rare. I cannot be counted on in a group: twice I rebooted at the OP fight. The game is fun, and I want to play, but I cannot stand the frustration.
Consider:
DAOC -- ok
CoH -- ok
Eve -- ok
WoW -- ok
CiV4 -- ok
Heroes of Might and Magic 3,4,5 -- ok
Star Wars KoTR -- ok
Half-Life 2 -- ok
Ghost Master -- ok
Rome Total War -- ok
Sid Meier's Pirates -- ok
NeverWinter Nights -- ok
Freelancer -- ok
Fable -- ok
Grand Theft Auto (3 flavors) -- ok
Oblivion -- ok
Morrowind -- ok
Saga of Ryzom -- BAD
So it is with a heavy heart that I say I will miss the game, and the extra good community.

Olepi
edit:
AMD Athlon 3200
1 gb memory
ATI Radeon 9800
broadband connection
Windows XP