Users seeing "You have made too many recent attempts on this account's password" when trying to login

Seems this is now a standard feature of MediaWiki. You'll need to disable it if you don't want that behavior.

Hi Ryan,

It turned out that the caching mechanism (APC in this case) on the wiki server was caching the expired credentials. It was a simple case of getting the cache restarted then users could reconnect without issue.