I'm really glad this didn't happen to a show I'd want to buy:

shows are subject to that's called "time compression"? Anyone? Anyone? Okay, for those of you with your hands down, here's what it is: When a television show is in first-run broadcast, it runs a particular length of time and fits in just so many commercials. When the show is syndicated into re-runs, they are usually edited down a bit, in order to shave off a few minutes of running time and squeeze in an extra commercial or two.
A different, more modern way of making room for extra commercials in syndication is "time compression". Simply put, the footage is sped up a bit, played at a slight faster speed, to achieve the same end result. It's like speeding up a vinyl record (you remember those, right?) from 33 1/3 RPM speed to, say, around 35 or 36 RPM (or thereabouts...I'm being metaphorical, not scientific). Not enough to notice, except for the very most discriminating ears (who claim that the actor voices sound more high-pitched and whiny, but it would take a sensitive person indeed to discern that).
Combat! on DVD seems to have been subject to that process, and die-hard fans talking on the internet are upset that distributor Image Entertainment didn't go back to the original film elements on this project.

As well they should be.  Most TV series, I imagine, will only get one shot at being released on DVD; it's not like there will be umpteen releases in the future the way there are with movies like Terminator 2, for instance.  If it's screwed up the first time, you're pretty much going to be stuck with it...