Proposed patches

[Miles Bader]

Hi,

The following patches are from my emacs tiling branch, and fix a number
of annoying crash bugs, but also seem to apply equally well to CVS HEAD
(however, at least in the case of the third patch, I couldn't actually
reproduce the crash using CVS HEAD).

Do these changes look alright to people?  [If I don't hear any
complaints, I'll apply them to CVS]

Thanks,

-Miles


patch-1:

patch-1
Description: patch-1

patch-2:

patch-2
Description: patch-2

patch-3:

patch-3
Description: patch-3

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