currently i am using R15007, but i recognized this behavior in the #R's before, too.
My system runs 24/7 (without sleeping).
My ISP disconnects me every 24h's - this disconnect happens at about 04:00 o clock in the night.
Every morning the adium dock icon shows "the black wheel" (connecting/reconnecting),
but nothing happens. even manually aborting the connection attemps and reinitiating them
via the adium menu brings no solution.
the only thing which really helps is restarting adium.
if there is anything i can investigate on this point, let me know here.