there is a parallel world where things go when the are tired of us for a while -- socks, lens caps, pens, and for you, apparently, cameras.
Have you asked yourself if you are asking too much of these items, emotionally? Perhaps you are too possessive and your possessions need more of a break than most.
i have had similar things happen
light meters, film, flashes, snoots, chemistry, friends
"stuff" but luckily no cameras yet
i have also had the opposite thing happen
things just appear, not my stuff, at least
not stuff i remember ... and fish in a fish tank ( 9 instead of 6 ) ...
i was told by a scholar that the "stuff" that just appears
is like ... well, it like the opposite of the alien abduction theory ...
the stuff that goes missing, well, it is usually in plain sight
out of view being used in an alternate reality ...
sometimes i find it in the bottom of the cup after a fewcups of espresso
A friend once suggested the rings of Saturn were made up of lost airline luggage -- perhaps there are other materials mixed in. :D
It happens to me too, right now the only flash meter I have is missing. I had a couple of semi rare tool's bought from the estate of a old friend who had passed away went missing and were gone for eight years. Last fall they just showed up on a shelf one day. Never have figured out how that happened.
What bugs me most of all is a book titled MYSTERIES OF THE UNEXPLAINED that just appeared out of nowhere on my bookshelf. I did not bring it home, and no one else in the house knows anything about it. Its a strange thing to have that happen.
About 6 months ago, I realized that I couldn't find two cameras. I looked everywhere multiple times. Then I found one of them on my workbench right in plain sight with 3 or 4 other cameras. Then I finally remembered that I had dropped off the other missing camera at the repair shop for a CLA when I picked up a completed CLA camera from the shop. That made me realize that I don't need any more cameras.
jmck - "There is a reason for that problem But I can not remember what it is."
Hmmm I have the reverse problem... I think I have too many cameras when I go look for a certain one and find one I forgot I had... or maybe my apartment is on the other end of the wormhole where all your cameras vanish too.... at least the cats haven't found their way here...