SU/G,
It's quite a common (authorised) practice to land without full flap on a number of aircraft! The flap is there to change the approach and landing characteristics to suit the conditions (even in normal operations). Sometimes the conditions don't necessarily warrant the use of full landing flap... Having said that, I don't know what the POH says with respect to the C182, but I know a number of operators that don't necessarily use F40 all the time.
Similar with the takeoff flap!
Lancer