Just about every discussion of real programming I've ever read on Slashdot reminds me of my favorite quote from the least-informed Perl book I've ever read. It went something like:

If you try to assign an array to a scalar, you'll get the number of elements in the array. Hopefully this bug will be fixed in a future version. In the meantime, do $len = $#ary + 1; because it's less confusing.

Update: I forgot to cast my vote. Why not Gloria? (I seem to recall Larry suggesting it fairly recently.)