In any application, if I do File > Open or Save As or pretty much anything that opens a file browser type dialog, the file names are missing. Any view (list, details, thumbnails, etc) and any sort order. All I see are the icons for the files and folders, and if I click on one of them, the file name shows in the file name text box.
I did a clean install of Windows 8 Pro and I'm pretty sure this was happening from the beginning, but I can't be sure. I did install several programs before I noticed... Office 2010, Firefox, etc.
This screenshot is the Open dialog in Word 2010, but it doesn't matter which program I use, they all look like this:
UPDATE: I decided to add another screenshot and noticed that the same behavior does NOT occur in Win8's Paint!!