HAHA. Does it indicate a quality control problem when the cameras that work well are duds? :-P lol.
But, Marko, I see what you're saying with the vignetting. Some of my shots have no definition on the edges at all, and some look pretty much perfect. Oh well, what do we expect from a $20 camera.
Does anyone else here have to fold up a corner of the film box under one of the spools in their Holga so the film tensions right?