hrmm, ppl i've helped with that problem it ended up being due to a script/addon being incompatible. since it seems the problem exists with every version after 6.03 for you, it was worth asking you about. wish i could come up with some solution so you'd be able to use the latest version, decidedly annoying when something that should work isnt. if you can web or telnet into your ADSL settings, i imagine you've already looked them over.
you mentioned that some of your friends have the same problem. just out of curiousity is there anything y'all have in common that others might not have? if you dont mind saying, what adsl do you use? i'd like to check dslreports forums just to see if others using it have the same issue.