I get a segmentation fault when I run cgminer. Probably an issue with that miner though, and not linuxcoin.
Can you post what was happening at the time and the actual error ?
I just ran it from the command line, with nothing else running. It goes to the main screen and seg faults immediately.
When I run it -n (I think that is the option) it does see my GPU's though.
Also... aticonfig does not work on my system, even if the first thing I do is accept the licence. It worked perfectly with .2a.
POCLBM is mining on my PC no problem right now though (but if I don't run it with sudo it says I cannot access some .elf file).