minibuffer complete not always correct first try

[Warren L Dodge <warrend@mdhost.cse.tek.com>]

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In GNU Emacs 21.3.1 (sparc-sun-solaris2.8, X toolkit, Xaw3d scroll bars)
 of 2003-05-05 on rosewood
configured using `configure  --prefix=/proj/wdt/gnu_sun5.8/emacs-21.3'
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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I use the mini-buffer completion mode quite a lot. For the most part it seems
to work just fine.

However, at time, it seems to completely complete at times when there are
ambiguous entries.

I also have the case-ignore variable set to ignore character case.

Usually it is when I am in RMAIL an outputting a message to a folder. I will
do something like this

o            output to folder
all<tab>     finds ALLMAIL
new<tab>     finds NEWJOB
bo<tab>   

At this point it would pick the folder bob automatically. This ignorged the
fact that there was a "borg" folder. If I delete back to "bo" then hit <tab>
it will show both selections as I originally expected.

Let me know if you need my .emacs file


Recent input:
<down-mouse-2> <mouse-2> C-x C-f . e m a c s 2 0 <return> 
C-x C-f . e m a c s <tab> 2 <tab> <return> C-s c o 
m p l e t e C-s <help-echo> C-s C-s <down-mouse-1> 
<mouse-movement> <mouse-movement> <mouse-1> <help-echo> 
<down-mouse-2> <mouse-2> C-a <escape> x a p r o p <return> 
c o m p l e t e <return> <help-echo> <help-echo> <help-echo> 
<down-mouse-2> <mouse-2> <help-echo> <help-echo> <next> 
<help-echo> <escape> x e m a c s <tab> <tab> b <tab> 
<backspace> <tab> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> r e p o <tab> r 
t <tab> <return>

Recent messages:
keyboard-quit: Quit [4 times]
Loading apropos...done
Type C-x 4 b RET to restore the other window.  C-M-v to scroll the help.
Loading pp...done
Loading /proj/wdt/gnu_sun5.8/emacs-21.3/libexec/emacs/21.3/sparc-sun-solaris2.8/fns-21.3.1.el (source)...done
(New file)
Matches (define-key global-map [S-tab]                        'minibuffer-complete)
Mark saved where search started
Making completion list... [3 times]
Loading emacsbug...done