> The problem is that 'image-next-file' calls 'find-alternate-file'
 > that does such buffer renaming:
 >
 >      (if (get-buffer " **lose**")
 > 	(kill-buffer " **lose**"))
 >      (rename-buffer " **lose**")
 >
 > and 'rename-buffer' changes the buffer's last name to **lose**.

Isn't the problem that it leaves the last name nil?  Does the attached
diff fix it?

Thanks, martin