HD2 APRIL 17 i cannot waite i hope paramount has not messed any of the scenes up, and as for the music we will have to waite an see i belive that all of the music is on there that is what i was told when i called them up so they would not lie

All the music is not on this set. It says it on the back of the box ("Music has been changed for this home entertainment version."). Our review will come soon. The theme song is also not on the set we hear.
Mork & Mindy and Laverne & Shirley also have music issues, but for those two, it says "SOME music..."

No theme song? Did Season 2 still use "Rocking Around The Clock?" ... I can't recall when it switched to "Happy Days"

No theme song? Did Season 2 still use "Rocking Around The Clock?"

Yes, they did!

I can't recall when it switched to "Happy Days"

That would be season 3(1975-76)

According to Pav, they are using the "Happy Days" theme instead of "Rock Around The Clock"