Lancelot, that new photo every year of you and your thai wife standing in front of your address sign, sitting in the house, etc, is a pretty standard request. I think they've done it like that here in Bangkok a good while now.
AFAIK, every one who applies for a yearly extension of stay based on being married to a thai national has their extension go "under review" for 30 days.
During that time a thai immigrations officer is supposed to come to your house and make sure you're really living where you say with who you say you're living with. However, I don't know a person in Bangkok on an extension of stay based on marriage who's had a visit by immigrations to really check on them. They just go back out after a month and get the extension stamped into their passport.
As I posted in one of the other threads, if someone needs that "married to a thai" year long multi-entry Non-Immigrant Type-O visa (the one where you border bounce every 90 days) go to Savannakhet Lao. They now offer same day service and require NO proof of any financials..