Hi Everyone.
I've been having the same problem. i have a 5G ipod.. i did the latest firmware update a while back, and the iTunes 7 update. After that, whenever i connect the ipod to a mac, i see the red circle with a line through, and its not flashing, then the ipod is locked up. only way to make it work is reset the ipod while its connected..
I tried a full restore, and that did not help.. then I pretty much gave up, and hoped that Apple would release new firmware.
In a last attempt of hope, i thought i would connect the ipod to my new makbook pro.. just to see if it was a problem with the imac. well, same again. ugh. rats..!
So, i tried a full restore from this 'new' computer..
This time, i noticed something different.. iTunes decided to download the firmware again, and re-flash the iPod.. (with the same version)
ah.. now it works !!! i went back to the imac.. connected it.. loaded up all my tunes.. and it works.. disconnect.. plug back in.. no freeze !!!!
So, it seems that if you can try another mac, and restore.. or indeed get the firmware to download again, and apply to the iPod.. it just might work !!!
Hope this helps some folks out!
Cheers, Keith
imac CD, MacBook Pro C2D, macmini PPC Mac OS X (10.4.8)
imac