I found this....
From designer Louis Koziarz: In software revisions before 1.2, if you restarted a game sometimes you would get this script :
Bud : 'Welcome back!'
Buzz : 'NOW GO AWAY!'
We had a few complaints that this was a little harsh on players, so the call was removed for the 1.2 release. That's all. The 'go away' quote was also spoken sometimes in attract mode if you pressed the flippers and attract mode sound was set to ON, that was removed as well.
Wonder if this was the only change or if there were others?