Hi GIles,
I've been here before with another title, Space Giraffe PC which got sorted and now here as finally bought an i-phone.
Expensive buggers but got a second hand one and first app to download was Minotron

Downloaded successfully in iTunes but on syncing an error

Apparently my iPhone 3g is not compatible.
Knowing little about this device I reset phone to factory and it also ran an update.
Started to sync and again was greeted with this phone not compatible.. boohoo.. why not ?
Any info appreciated,
Andy.