HG2 does the same to me too, exact same error meesage. I think your 3D is working fine, but it maybe a compatibility with some Loki games and maybe glibc 2.2. If you check product requirements you will see it mentions glibc 2.1.
I haven't got 7.1 yet - I'm still on 6.4 - but will be upgrading in about a month's time when I get home (working overseas at the moment). I'm a bit concerned about this library issue - are there many packages from third parties that don't work on 7.1 because of the library update? In particular I'll need Vmware as stable as it is under 6.4, and want I'll to play some games (Q3A in particular). Is this too much to ask? Should I wait until companies like Vmware Inc update their packages, or am I worrying about nothing?