yeah, but usually one is able to add text to the summary fields: title, subject, comments, etc. I use this a feature lot...enter comments so that i can remember what the files are about. then when you hover over the file icon, the data is displyed, including the stuff that i wrote.
then recently i've noticed that with certain file types windows won't allow me to enter my own stuff...
in the attached pics you can see all is good in the case of jpg files, but not so in the case of png.