Font locking bug - infinite loop

I've been whittling away my ~/.vm file until I could get this bug to occur reliably. I've also run xemacs -q to avoid loading my own ~/.emacs file. So I think after many weeks of trying to pin this down, I've come down to a small bit of ~/.vm code that triggers the bug on my system. Your pattern (setq vm-summary-font-lock-keywords '(("Re:" 1 yellow t))) Matches the first paren expression. (You don't have any) maybe you meant something like: (setq vm-summary-font-lock-keywords '(("Re:\\(.*\\)" 1 yellow t))) I think you want: ;; Font locking for the summary buffer (defun my-vm-font-lock () (interactive) (make-variable-buffer-local 'font-lock-keywords) ;;(setq font-lock-keywords-only t) (setq font-lock-keywords vm-summary-font-lock-keywords) (turn-on-font-lock)) (add-hook 'vm-summary-mode-hook 'my-vm-font-lock) (setq vm-summary-font-lock-keywords '(("Re:" 0 yellow t))) -jeff