I've installed Arch Linux, and I'm attempting to get TightVNC working.
I've installed TightVNC 1.3.10-5 from the official Arch Linux repositories.
I've set ~/.vnc/xstartup to start a KDE 4.7 session.
However, when I connect to this session, the quality is appalling bad and has nasty artifacts. I've set the connection profile to High-speed network, and I've even disabled JPEG compression (it's a LAN), and it's still very bad. I've also tried changing encoding in the viewer from Hextile to RAW, still looks the same.

I've also pasted my TightVNC logfile here:
http://paste.pocoo.org/show/460633/
Any suggestions on fixing this?
Cheers, Victor