Thanks for posting this.
My issue with the application is the lack of specifics. It gives you a list of documents you can provide to show you live together, but no where (at least that I could see) did it specify that an applicant must provide proof of marriage and proof of residence (lease agreement, mortgage statement, etc..)
Now, I provided our marriage certificate when I applied for my spousal visa in America, so if I hadn't asked on this forum, I probably wouldn't have provided it again. Also, as there is so much to provide with the application, I could see how someone would overlook providing proof of residence.
Am I just being stupid, or is this a valid issue?