(set-screen-width characters) and (set-screen-height lines) in my `.emacs' instead of specifying `Emacs*EmacsScreen.geometry' in my `.Xdefaults' but this does not work in XEmacs 19.13.
These two functions now take frame arguments:
(set-frame-width (selected-frame) characters) (set-frame-height (selected-frame) lines)
We have switched from using the term 'screen' to using the term 'frame'. The correct entry for your `.Xdefaults' is now:
Emacs*EmacsFrame.geometry