>> *** Window resizing functions.
 >> A new standard function for resizing windows called `window-resize' has
 >> been introduced.  This and all other functions for resizing windows no
 >> longer delete any windows when they become too small.
 >
 > This is a bit buried if one simply searches for fit-window-to-buffer e.

It was a very invasive change mainly affecting `enlarge-window' which
was called by the old `fit-window-to-buffer' (note that calling
`fit-window-to-buffer' with Emacs 23.1 could delete WINDOW itself).  I
didn't go through all callers of enlarge-/shrink-buffer to check whether
they should be mentioned to.

 > I got into this when I discovered that with Emacs 24.1
 > Electric-pop-up-window does not behave anymore as expected. It uses
 > fit-window-to-buffer for possibly grabbing the whole frame. In the
 > context of what Electric-pop-up-window wants to achieve this is a
 > reasonable and documented behavior.
 > Possibly there is more code that relies on the old behavior.
 >
 > But I agree that it is probably cleaner if functions such as
 > Electric-pop-up-window implement this old aspect of
 > fit-window-to-buffer in some other way.

I have no strong opinion on this and never managed to understand how the
old window resize routines worked.  What about the version I attached?
If necessary, I can get more aggressive ;-)

martin