I was lucky to discover this one early on Tuesday for both one of our English accounts and our Japanese accounts.
Here the glitch must have been with the integration of the Google house tools and their new API - as these bulk uploads were done by our ad rep team.
I was fixing the English when we discovered the Japanese problems.
Apparently the API also dealt major problems with bid management tools according to the Google Blog. So all those ROI tracking and bid management companies better be checking to see the status of their clients Google ads...