I updated to 7.0.3 about a month ago and just realized the "Force Selection" function for my Text Input options has stopped working.... customers are able to move past the screen even if they've left the field blank.
I don't think I changed anything that could have caused it... the Force Selection box is still there and is checked.
I just checked here and that feature appears to be working fine. Can you try updating again and if that doesn't help, let us know a product on your store where the problem is happening?
Sorry for the slow reply here, your response was a clue that it's something I had broken... it took me forever to discover, somehow the proddetail header was missing the reference to ectcart.js .