Thank goodness I thought it was me.
Ancestry messed my account up a while back and I figured something had gone awry again when it was telling me to upgrade to see certain info - I've got a world membership so I shouldn't need to upgrade for anything.
Tried to login in with web browser (I was in FTM) and noticed I wasn't logged in (I leave it logged in all the time), tried to log in and it wouldn't accept my details. Figured maybe I was having a blonde moment so clicked the forgot password link (just incase) and it tells me there is no account with my email addy! WHAT?
But now I see I'm not the only one, so it must be an Ancestry issue, thank goodness. Let's hope they sort it out PDQ!