Again, I've found several threads on several boards on this subject, through my searching. The problem lies with AIM, not the router. Or so all of these threads conclude. And there is a beta version of AIM out that supposedly solves this problem, which I haven't had time to test yet.

I have the latest firmware for my router. And its release notes do refer to better compatibility with AOL, which would let one hope that would transfer to AIM. But I didn't really expect it would.

I will test that beta version of AIM soon and post my results.