I got an email saying ads disapproved (below). Adwords is very vague on description of problem. I just switched all campaigns to a new domain. Anyone else run into this problem and can offer advice on how to resolve it? Thanks in advance.... We have reviewed your account and found that one or more of your ads or keywords has been disapproved for violating the following AdWords policy: -------------------- One display URL domain per ad group: The display URLs within each ad group must have the same domain. Please edit your display URL accordingly. This policy applies to both active and paused ads. If your ad group contains paused ads with a different display URL domain, please edit the display URLs or delete the ads.
What's probably happened here is that you've paused your old ads in those adgroups and activated new ones with new display URLs. Basically since Google continues to take into account paused ads, you're flagging up as having multiple display URLs in the same adgroup, which they disallow. The solution here is to either delete the old ads (though you'd lose your statistics), or create new adgroups to run your ads with the new display URL.