I installed the new iTunes immediately after release this afternoon on both my PC and my Macbook and it works great. No problems.
When I tried to install it took soooooo loooong
After the install none of the icons worked
Afther hunting around and starting the .exe myself it would play no music and no podcasts.
Went to a prior restore point with the OS (Win XP) and now ver 6 does not work
Tried to reinstall ver 6 ane the install hosed!
tried to execute ver 6 anyway but it said it needed quicktime
tried to reinstall quicktime and the install hosed!
It is time for the full wrath of all BOL
Both Tom, Molly and yes even V.
Apple just made all my on-line purchased music worthless, and the only way to hear the podcast is through the web!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic