I've just tried to sign up with my usual email address, however it was failed by the validator.
It seems that you can't have email addresses with '.'s before the @ sign. Ie email@example.com
I'll take a look at the regular expression and fix this ASAP
I will forward existing users a free update and post a message here once fixed.
I've fixed the email validation code. This will now allow special characters within the first part of the email address. I've also added some extra validation to ensure users enter a top level domain within the email address.
Thanks for the suggestion - Please let me know if you have any other comments