Unknown Icon Overlay

[hpearce]

Some of my icons have an overlay image ... a little grey box with what looks like a pen/pencil in it.
I have no idea what it means or where it comes from.  Any help would be appreciated.  Probably something stupid I should know.. See below

[attach]

[hpearce]

resolved ... Norton 360 backup marks all filestypes selected for backup with a status overlay.
I found a setting to turn this off.

[mouser]

weird.. nice that you figured it out -- i'm guessing someone else will stumble on this thread while searching one day and be thankful to read the answer.