I'm not sure what this one (http://stardustathome.ssl.berkeley.edu/ ... =3108952V1) is, but it looks interesting. There is a very faint trail of dots (it is entirely invisible when the VM is focused on the surface & the footprint-shaped blob is in focus) to the right and below the footprint-shaped blob, running almost directly up and down. It is only visible at all when the VM is focused well below the surface, and it's still really hard to see.
I see them too, and count five in a more-or-less straight line. But (a) the line isn't perfectly straight, and (b) the top and bottom ends appear deeper than the middle, which would imply a rather wonky particle trajectory were they in fact related. While this might well be possible, there is nothing to indicate an entry point (at least within the movie frame), nor evidence of any track-like link between any of the dots. I suggest a chance alignment of inclusions.
John
I found a weird object in 9914643VI today. I was a large black blotch, at least 2.5 centimeters long and 1/4th that wide. It formed almost a perfect lower-cap "d."
ERSTRS
Interesting formation in movie 6741470V1. Runs from top to bottom on the right hand side, and has an approx. thickness of 10microns by 20 microns. More opaque in the center than the edges. Has a slight twist to it. possible human contaminant (hair?) or metal shaving maybe?