I've recently upgraded Emacs from v22 to v23 in Ubuntu Jaunty 9.04. Prior to the upgrade when I issued the
switch-to-buffer-other-window command (either via
C-x 4 b or
M-x switch-to-buffer-other-window) the new window was below the existing window, however after upgrading it started to split the window horizontally, resulting in the two windows side by side.
I've googled and searched through the customize menu item, but couldn't find any reference or solution, could you please tell me how can I change this setting? Thank you very much.