Hey there, Under Custom Fields, field type, there is Regular Expression Validation I've tried entering http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)? which Dr. Google suggested would work to require a valid url. But it doesn't require anything special at all when I'm adding a new post under this custom field. am I missing the point...good possibility. If so, please help me to understand what this is intended for.