I really miss the ability I had in Windows to control-click files to pick just the ones I want (as opposed to shift-click which selects everything between those two)... when I attempted this in nautilus, it didn't work. I finally got around to trying to figure out if nautilus has some other way to do this, but what I've found says the control method should work...?: http://linux.about.com/library/gnome/blgnome6n6b.htm
hmm, I went to the "Layout Options" tab and under "Ctrl key position" I changed it from "Default" to "Ctrl key at bottom left". It works fine now, but when I go back into the settings it says "Default" again.