James Gasik
We don't talk about Pun-Pun
I do seem to remember a desire to not have people double up on groups. No Paladin Fighters (well, except that one way...) or Cleric/Druids. Not sure why, really. Maybe they thought it would be silly.A change that I remember noticing is in the Dual Class characters section. The '89 version of my PHB says
"There is no limit to the number of classes a character can acquire, as long as he has the ability scores and wants to make the change." It does note, however, that some classes have alignment restrictions that make them incompatible.
On the other hand, my '95 PHB says
"A character can acquire up to four classes, one from each group, as long as he has the ability scores and wants to make the change." with the same note about alignment restrictions.
There were other changes too, many more subtle, but I always remember that one.
Then again, The Complete Bard's Handbook let you be a Thief/Bard so...