In Emacs 23 and below (for as long as I've used Emacs), I would change buffers by hitting F10-b (F10 brings up menu, b is shortcut for Buffers).
Then there is a nice little list of open buffers and the first letter of the filename is usually the shortcut to switch to that buffer.
This made it really fast to switch back and forth between multiple files (I want to go to index.html == F10-b-i ; now I want to switch back to about.html == F10-b-a), it was very simple.
Emacs 24 changed that behavior and so the quick switching between buffers based on the first letter of their filename went away.
Does anyone else know what I'm talking about? Is it possible to get the previous behavior in 24? I'm slowly finding packages that won't compile in Emacs 23 anymore b/c they depend on new Emacs 24 elisp functions. I only ever use Emacs from inside a terminal (emacs -nw), so that's why I'm navigating buffers by the F10 menu.
EDIT: Well, I may be an idiot. I just downloaded the latest 24 build and it seems to be working as before again! Not sure when this changed, but maybe this is now a non-issue. I feel a bit silly, but maybe this will help someone else?