...the whole first pixel row (up) is blinking between black color and visualization backgroud (so nearly all pixels there are black, but three or four somewhere in the midle are white or other colored sometimes).
The unwanted artefact don't start immediatelly after fullcreen mode started but after some type of effect (I think that the "spray" effect with dots causes problem.)
I saw a similar problem with another plugin Ben's Tripex 3 when was beta testing it back in the day and that turned out to be alignment problem for all machine. Here I do not get the problem so it is not that as it doesn't effect tthis machine I am using atm.
You could try you texel alignment properties for you card.
I am not on my computer at them moment (this it's a a crappy P700, Matrox G400) so it is from memory. There should be 8 setting 0-7 either odd or even. Probably by defualt on 4 try seting it to 3. (or it might be vice-versa any change it + or - 1). Ryan has been know to have a problem with texel alignment in the past so maybe thi sis case again although it is a long shot.
"Rules are for the guidance of wisemen and the obedience of fools"