Help Alien spores on my vinyl...

I've noticed that some of my records have begun to sprout this stuff that looks like white spots--generally more prominent around the label, but spreading out from there at decreasing intervals as you move towards the edge of the record. It's not actually white but when you hold the record at an angle that's how it looks against the black of the grooves. It causes audible distortion and vacuum cleaning with RRL Deep Cleaner and Record Wash does nothing to it. Aargh! Anybody know what this stuff is, what causes it, and for the love of God, how I get rid of it? HELP!

Thanks,

Jeff -- hopeless addict of vinyl...the_original_high-res medium.