Today being the first day of release, I just picked up two panes of the Kansas Forever Stamp fresh out of the package at my local post office:

Actually, I picked up two panes (one for postage; the other for collecting) but as I was looking at them under a bright light I noticed a very minor irregularity in stamp #7 (bottom left of right plate block) where it looks to be a minor flaw (?) ... maybe a piece of dirt or debris in printing ... just above the "ns" in "Kansas". I'm not sure how good my scanner is to pick this up and if it is even warranted to do so, but I share a hi-res close up of the specific area in question:

None of the other stamps in the pane show this. I then went to the second pane of stamps and there again the same occurrence in the same stamp only. The reverse backing paper suggests both panes are from the top center plate position.
Is this insignificant or is it something to be considered collectible?