What happened to my finder icon???

[Peter Nacken]

Now this is just a little curiosity which I want to share and maybe someone
has seen it before (and maybe it is an alarm signal?)

I noticed last night that my finder icon in the dock has 3 lines in it .. I
would guess the graphic file is somehow corrupted .. But I have no idea how
that happens .. The machine works otherwise fine, for days now (no, have not
reset yet, I guess the phenomenon would go away doing that)

I put a enlarged version of it on caipi.scandal.de/finder.jpg

I just checked, the bars become very clear and visible when I turn
magnification on for the dock.

Weird ! 

Peter