Alright, just making sure (that you didn't think he was perfect :)
Here are a few examples I selected.. I could find more if you want.
http://www.chessgames.com/perl/chessgame?gid=1075597
Not a lot can be said about that game; it just wasn't played very well by either side. Morphy clearly should have lost, but he didn't.
http://www.chessgames.com/perl/chessgame?gid=1075601
Cremorne should have played 9...Nf6. After 10. Nc3 0-0 11.0-0 Bg4... where is the compensation for the pawn Morphy sacrificed? I sure don't see it, and neither does Fritz 9 (~-1.35). Morphy went on to win this game too. (this was a blindfold game).
http://www.chessgames.com/perl/chessgame?gid=1075088
This was another game where Morphy played very poorly. The first big error was 7.0-0. This is just wrong, and it gives black two options: he can grab two pawns and remain in a decent position with 7...dxc3+ 8. Kh1 cxb2 9.Bxb2, or black can get very active with 7...Nc6 (this was played in the game). Morphy ended up being in quite an uncomfortable position, and Boden had many, many chances to take control of the game, but he didn't. Against a competent opponent, Morphy would have been routed.
"you don't really think he was perfect, do you.. ?"
I never said he was perfect. far from it. But one can't make a statement like he "...did make a number of questionable moves in the King's Gambit" unless it's demonstratable, otherwise anyone could claim anything with impunity.