if you're ipod touch should run the gen 3 software you may have problems if the gen 4 software hasn't dowloaded properly.
to download it properly, log onto the link provided, download the software and save it to your desktop, when dowloaded, open itunes and connect ipod, put ipod into recovery mode by holding lock/power button & menu button for around 5-10 seconds, once you've done this and you have the restore ipod screen on your ipod, press shift and click restore, then it;ll open up a drop box where you can choose the software you wish to upload to the ipod, let it go through the installation process and you'll have ios 4 on there. I have done this on gen 1's for people i know to put ios3 on them (before 4 was out) and is simple. Media URL: http://www.theiphoneguru.net/iphone-downloads/
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