Contact Form invalid email address error.
I as dutifully went to report an error in the wrong location on the site (the above link) I had a problem.
As I typed in my email address, the "@" character triggered the invalid format message.
Oddly, when I clicked submit (despite it also having a validation error message) both errors disappeared. It did not submit but was now happy for the moment. Tried an new one and was looking at an error again. Hoping around between various fields on the form caused this behavior to stop.
Considering I was locked out of changing my email address on my profile, it was quite humorous because I also couldn't contact Coral. Lol.