Ediff merge problems

[LaserDoodads Info]

Two unwanted things are happening during a merge of 2 buffers.
1. If you type ? so that the little Ediff Control frame is big and displays help, 
  you can't actually merge until you shrink it with another ? command.
  While big, typing n (or p) causes the frame with the buffers being merged to 
take focus.
  You've got to M-tab back to the merge control frame to issue another merge 
command.
2. If you attempt to save the buffer containing merged text and the file to 
which you want to save already exists
  the following error occurs.  Thereafter the control panel is hozed up and 
ignores all commands.

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
 file-name-nondirectory(nil)
 set-visited-file-name("c:/Program Files/emacs/emacs/lisp/net/ange-ftp.el" nil)
 write-file("c:/Program Files/emacs/emacs/lisp/net/ange-ftp.el" t)
 call-interactively(write-file)


In GNU Emacs 22.0.50.1 (i386-msvc-nt5.1.2600)
of 2005-07-09 on LD1
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-msvc (12.00)'

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: nil
 value of $LC_CTYPE: nil
 value of $LC_MESSAGES: nil
 value of $LC_MONETARY: nil
 value of $LC_NUMERIC: nil
 value of $LC_TIME: nil
 value of $LANG: ENU
 locale-coding-system: cp1252
 default-enable-multibyte-characters: t