this was happening to me quite a few times on several accounts, for some reason in my logs; it's using one of my isp's ips and not my ip. it also loads very slow which is bad if i'm trying to publish something. everyone else who visits is fine, no faults. i've tried a tracert check and it seems to take too long to respond on some of them.
this occurred when i was switching accounts moving files/deleting files from them; i guess it's x10's countermeasure to a lot of activity done in a short period of time??