Castlevania and Castlevania Legacy Of Darkness

The only bugs I have seen so far in both these games is:
Some sound crackling and freeze-ups when the trees fall in the beginning
The game has random lock-ups. The game will freeze for about 7 or 8 seconds (only the picture will freeze) so the rest of the game is still going on. You can be getting attacked or whatever. This is fixed by setting frameskip to 0, but then it is pretty slow, like 50-75% or so.
These are the only bugs I have seen so far.