Google Analytics was experiencing an issue with the "Content Data" reports where it would not show information in some cases. Specifically, if you selected an individual date from the date selector and then viewed the Content Data reports, it would show up with no data.
The issue was first confirmed by a Google representative in Google Analytics Help. In that thread, Analytics Pro Christelle said two days ago:
Thanks everyone for the posts. We are aware that the Content reports have not updated and are showing 0 data when you select an individual date for the past week. We are working on this - and, it will be fixed soon.
Then this morning, Christelle informed us it was fixed.
We experienced a temporary issue with displaying data for certain dates, which has now been fixed. You should start seeing correct content data going forward.
Forum discussion at Google Analytics Help.