Hi,
This is my first post but i've been reading aroudn these forums for a while. Firstly i think this is the best MAC forum around =)
Im from Melbourne, Australia and been a PC user for 10years but just purchased an ibook G4 and lovin it. Oh... and also a 3rd Gen 15Gb iPod
Anyways on with ur iPod problem...
My iPod after about 11months of use decided it would randomly reset or turn off wenever it wanted to. Like every 5-10mins. And it would also say that the battery was running low when ive fully recharged it. I tried updating it on the PC and the MAC to no avail.
So... i went to the Apple Centre that i purchased it from and they gave me a replacement
But that replacement turned out to have a HDD problem which made really high pitched sounds and couldnt upload more than 2 songs at a time or it would just lock up. I went back to get that replaced too. And for now this ipod seems to be fine...
So maybe take it back to your store and try get it replaced.