I get the following backtrace when choosing
<menu-bar> <file> <Open Recent> <More...>:
Debugger entered--Lisp error: (void-function tree-widget-theme-name)
tree-widget-theme-name()
recentf-open-files(("/etc/profile.d/modules.csh" [file list stripped]
"/etc/profile.d/gnome-filesystem.sh") "*Open Recent - More*")
recentf-open-more-files()
call-interactively(recentf-open-more-files)
Emacs was started with "emacs -no-site-file" and this .emacs file:
(recentf-mode 1)
(setq debug-on-error t)
This is the ~/.recentf file: