AOL and mail-accepting rules

I have a client who is experiencing problems with sending mail to AOL. I am not resposible for their email service (yet) but I'd like to know if AOL has changed their policy on anti-spam / mail receipt for their customers (RBL, SORBS, rDNS validation), or if there's a real problem with AOL inbound mail for the past 2-3 days. thanks -e-