[KOML] Back latch looseness and light leaks

[Jay Maynard <jmaynard@texas.net>]

I've scanned the contact sheets of the first roll I shot with my Rapid Omega
M, and put them up at http://conmicro.dynip.com/~jmaynard/kocntac1.jpg (and
2 and 3, too). If you look at kocntac1 frames 4, 6, 7, and 9, you can see
there's significant fogging at the right side of the frame, corresponding to
the left side of the camera. My camera has (for now, only) a 220 back, and
the latch is loose - it'll rotate behind the film reminder holder and let
the back get loose; when it does, the left side of the back wiggles a fair
amount. (So does the right side, for that matter.) Is this a common problem?
How do I fix it?

Also, what's the edge fogging near the end of the roll from? Is that just
sloppy handling (I've never shot 220 before), or is something else at work
here?