Registerfly.com
Did not renew my domains as I specified, didn't tell me they weren't going to either, but now 4 domains are gone, ripoff!
I had 9 domains registered with Registerfly. Eight of them were configured to auto-renew (I was letting one expire), and had a current credit card on file with Registerfly. Sure enough, 4 of the 8 domains expired because Registerfly just didn't renew them. They didn't bill me, didn't notify me, ...