The episodes are pretty much unedited, they all run around 24 min. The original theme song used in the first five episodes was "What A Wonderful World" but it's the regular theme used for the other episodes on the DVD. There is also a different cold open in "Rachel's First Date" than what was originally used. For reruns they added new cold opens for four episodes featuring Steve Urkel to make it look like he was there from the beginning. The other three use the original cold opens. You can read a more in depth review here:
Karen, thanks for your comments and the review link. That helps a lot. It appears that Warner hasn't done any major damage to this release. I find it incredibly annoying when the dvd releases on many of these older shows are the edited syndicated versions with key scenes omitted. Thankfully that doesn't appear to be the case here.