I'm having an issue when using a Date field (e.g. Birthday field appear if they choose they are a person, hidden field if they choose they are a company) but seems that only happens when editing because I have never received a problem when they use the register form. The error is not just about required field missing (#1227692: Required fields still required even when they are hidden) but the content (obviously empty) is not valid.

I have no idea if this issue has something to do with: #671820: Compatibility with Date Field, #268560: Compatibilty with date module & #1398836: Not working when date is dependee