InfoPath Dev

I have a SP Online list with an InfoPath form that was working until today. Suddenly, when I hit the New control from the SharePoint list, the IP form doesn't open. All that happens is that the list is redisplayed. Any thoughts? I've checked permissions, deleted the form from the server and republished. I'm at a loss.

Hopefully someone else will reply if they have the same issue - I checked on of my test lists that has a customized IP form and it opened. I think you should open a support ticket with Microsoft - SharePoint Online is a black box, and only Microsoft will be able to check the logs and so forth. EDITED TO ADD: Sorry, didn't realize this post was from the 11th! Hopefully its been resolved by now?