What should I do when Google says my feed was 'disapproved' but there is no reason provided?

First try logging into your Google Merchant Center and clicking on the data feed name. Google will often post the reasons for rejecting a data file here. If there are no specific reasons listed, use the following link to contact Google to get some information about the feed:

http://base.google.com/support/bin/request.py?contact_type=error&ctx=direct

Google is usually very good about sending a reply, but keep at them if you don't hear back within a couple days.