How to actually invert the fuzzy selection?

[andreim]

Thank you very much, you nailed it! That's exactly what I wanted to do. As for the procedure, I'll search for a way to automate it, macro or script-fu.
I even installed 2.8 thinking that it would be a 2.10 issue 

I appreciate your time and everyone else's. Guys, I give you that -- the level of kindness of this community comes first in the top of the dozens communities that I'm part of.