MOTM

So I was soldering up the prestuffed resistors on my 480 this evening
(mmm...prestuffed! I could get used to this luxury...) and I had this
nagging question that I thought might be apropriate for this board. I
noticed this pcb has lots of pass through holes, or whatever those
little holes are called. Some of the kits have instructions to seek
out and fill these holes, and some of the kits don't (the 480
quick-kit doesn't mention them). My guess is that it has something to
do with who manufactures the board, and/or the board design. Does
anyone have any further insight on this? Should I just be filling them
willy-nilly? Just for the heck of it I filled some of them on the 480
board, but there are a LOT of them - getting them all would be a large
undertaking. 

Steve Drake