[Bug: 21.5-b28] dired decode setting get confused after gnus run

[It's me FKtPp ;)]

Gnus v5.10.8
XEmacs 21.5  (beta28) "fuki" c32b3d10c56b [Lucid] (x86_64-unknown-linux, Mule) of Wed May  7 2008 on workhard
200 news.gmane.org InterNetNews NNRP server INN 2.4.1 ready (posting ok).

On Wed, May 07, 2008 at 05:12:12PM +0200, Aidan Kehoe wrote:
> 
>  Ar an seachtú lá de mí Bealtaine, scríobh It's me FKtPp ;): 
> 
>  > ================================================================
>  > Dear Bug Team!
>  > 
>  > I find that dired buffer decode setting will get confused whenever I
>  > finished reading news with gnus.
>  > 
>  > Step to reproduce this bug:
>  > 
>  > 1. open a dired buffer on directory contains some file with Chinese in
>  > their filename.
>  >  => Chinese characters get properly displayed (chinese-gb2312) in the dired buffer
>  > 
>  > 2. kill the buffer, and run gnus by running `M-x gnus <RET>'
>  > 3. quit gnus by typing `q'
>  > 4. re-open dired on the same direcotry (with those chinese-files)
>  >  => Chinese characters get garbled (displayed in latin-iso8859-1)
>  > 
>  > Maybe you can also reproduce this by using some file with
>  > japanese/korean characters in their filename.
>  > 
>  > ================================================================
>  > 
>  > [...]
>  > 
>  > Coding system aliases:
>  > 
>  >   'native                              is aliased to utf-8
>  >   'file-name                           is aliased to binary
>  >   'mswindows-multibyte-system-default  is not a coding system alias
> 
> file-name should be an alias of utf-8, not of binary. Looks like Gnus is
> trashing it, or the related variable file-name-coding-system, but a quick
> grep doesn't point me to where--it's always bound, not set. 
> 
> Can you do a M-x gnus-bug RET, and CC xemacs-beta? The version info there
> would seem to be relevant. 

Sorry, forgot to cc xemacs-beta list~

resent
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