Some things I saw that really bother me (some were likely mentioned here already):
- loss of Show Duplicates
- loss of convert AAC format to MP3
- Get Info no longer allows you to suppress gap between songs (maybe it is done automatically now)
- The new Search field in the upper right hand corner is unintuitive. If you want to search for a combination of an artist and song (i.e.: "Stones Sympathy") it says "No Results" instead of finding "Rolling Stones - Sympathy For The Devil". They completey screwed up the fast searching I am used to.
- Albums view shows only in one view that has the pictures of the albums. Except in my case, I purposely have no album art, so I just have a bunch of useless empty boxes and no way to change the Album view.
- Also, I don't know if this is related or just coincidental, but my iPod Classic 7 160GB started acting odd soon after I started using iTunes 11. The iPod will intermittently reboot itself when I try to play a song or podcast. It can be maddening because once it starts, it won't stop. I read it could be a bad hard drive caused by dropping it, but I have not dropped the iPod in a long time, so why it it suddenly start doing this now?