I just discovered that the permissions on SVGALIB differ depending on the kernel used, in Slackware 11 RC4. I tried to run links in graphical mode on a console (not an xterm or so, but the console, really)
$ links -g http://www.slackware.com
As user: Error message, insufficient privileges.
As root: Works just fine!
Works like a charm as user as well as for root.
Does that make sense to anyone? What's the reason behind this?