A bug in the newest iTunes version?

All softwares have been updated in the 10.6.8 that I am using now. The songs I’m listening to in this gadget were imported from my CDs into Apple Lossless. The activity for both the monitor and the CPU are low, but not really something that needs too much attention. When I heard the music skip, I decided to replay the music and was surprised that after that, I don’t encounter the same problem. I wonder if this is just one bug in this newest iTunes version as I don’t remember that this has occurred to me in the past when I listen to songs on iTunes.
