Due to some changes in the public Google Base / Google Merchant Center attributes feeds, an issue with Magento’s Google Base functionality has popped up. As far as I can tell, this issue will affect all versions of Magento. I have personally verified that the issue affects 1.4.0.1 and 1.3.2.4 and made the fix for several clients. I have put together this post with detailed instructions about fixing the error in the hopes that it will save some others time in dealing with the issue.