I'm still trying to figure this one out: after doing an apt-get upgrade a 
couple of weeks ago, I could no longer dialout unless I was root. Naturally, 
the first thing I do is check the permissions: 
lrwxrwxrwx 1 root dialout         10 Jun 20  2001 /dev/modem -> /dev/ttyS3
crw-r-----   1 root dialout    4,  67 Jul  9 19:54 /dev/ttyS3

Next, I check that user 'peter' is included in the group 'dialout'--yep. So 
why does wvdial say 'Cannot open /dev/ttyS3: Permission denied' and kppp just 
say that it cannot find the modem? I did not have this problem before, and a 
dist-upgrade yesterday didn't help anything. Suggestions welcome.
	:Peter