I also tried this on other sites and server. It seems to happen on them also. I am not sure the issue is really related to the IIS Reset after all. Some users had the issue right after IIS Reset and never could get accounts to create. We also use the Dancing Goat demo and enabled. After a few user and QA, we found it happened on there also. Chrome and browsers may be causing part of the issue. We have determined, the Webpart is not executing the lookup or login phase. For now, we have dumped Facebook Connect. We have integration to Twitter and G+ working perfect.