Startup bug

[nickvence]

I'm using Emacs 21.4a and each time I open an existing file :: gets
inserted at the beginning. Where might this bug have slipped in? Here
is my .emacs file:
(global-set-key "\M-g" 'goto-line)
(add-hook 'c++-mode-hook
          '(lambda ()
             (font-lock-mode)
             (c-toggle-auto-state)
             (c-scope-operator)
             (show-paren-mode)))

Thanks,
Nick