<<Array overflows now seem to crash my programs (and FB's debugger), rather
than reporting an array overflow.  ...  What's Up?>>

As long as someone's answering this, can you answer an almost identical
question I was about to post on my own:

If I've set up
   DIM gMyArray&(2)
...why do I _not_ get a crash, or error message, or anything, when I write to
   gMyArray&(3)?
Note I said "when": I've actually done this, by mistake, with no ill effects.