ok, ive run windows for ever, and ive never heard or seen this before...
i run windows xp pro, just so you know.
what happened was, i was sitting at my desk, playing guitar. and i went to turn my volume down, and the guitar neck hit several keys.
My Documents were open and some how this happened...

please note: there are no words under the thumb nails. this isnt some huge issue. but its an annoyance. iv looked threw everything. even tried hot keys at random to fix it(ctrl+{a-z}, alt+{a-z} etc.). ive also checked ALL the folder options and details, and views... nothing helps.
any help would be great thx.