iTunes 10 poor audio quality

After upgrading to iTunes 10, I noticed when playing music from my library that the audio quality is significantly lower than previously with iTunes 9.x. The audio quality sounds muffled and distorted.

I found this thread in the Windows section, but wondered if other Mac users were experiencing the problem as well.

http://discussions.apple.com/thread.jspa?threadID=2571907&start=0&tstart=0

I ended up downgrading back to iTunes 9.x and the problem was resolved. Any ideas? I'm going to end up needing to use iTunes 10 for my new Nano I think ... 😉