Unusual behavior of `gnus-uu-mark-all' (M-P a)

[Harry Putnam <hgp@sbcglobal.net>]

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I've noticed something strange lately with the command
gnus-uu-mark-all (M-P a)

Certain messages do not get marked anymore.
Recently I removed  (standard-display-european 1) from site-start.el
because it seemed to be causing emacs to see multibyte chars as UTF-8.
Since removing it... The different behavior of `M-P a' showed up.
Put it back in, and M-P a marks the same messages it missed.

gnus-uu-mark-buffer (M-P b) does the job with or without
(standard-display-european 1).

Anyone know what is happening here?

Below are two sections.  First section shows a summary line taken
from summary  buffer with (standard-display-european 1) in init files.

This same line is missed with (standard-display-european 1) removed
The data below `=====' is gotten by placing cursor on one of the
subject chars and pressing C-u C-x =:
The double ===== marks the second section where I did the same thing
on two summary lines with (standard-display-european 1) removed. 

=============================================================
=============================================================
Section 1:

1 line from summary buffer:   
    1O# 08-May [  15: ÷ë                  ] »Ú½§òÊþØ·»ô20ª
========================================================
  character: ° (0260, 176, 0xb0)
    charset: eight-bit-graphic (8-bit graphic char (0xA0..0xFF))
 code point: 176
     syntax:   	which means: whitespace
   category:
buffer code: 0xB0
  file code: not encodable by coding system iso-latin-1
  font: -Adobe-Courier-Bold-R-Normal--14-100-100-100-M-90-ISO8859-1

There are text properties here:
  gnus-number          97
  face                 gnus-summary-normal-ancient-face

====================================================================
====================================================================
Section 2 

With  (standard-display-european 1) commented out

Two from summary buffer

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 1O  09-May [   4: 晓丽                ] 来看我的照片,体验另类刺激!

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 1O  09-May [  34: Бесплатно посещаемос] БЕСПЛАТНО УВЕЛИЧИТЬ ПОСЕЩАЕМОСТЬ САЙТА
====================================================

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  character: 看 (0117664, 40884, 0x9fb4)
    charset: chinese-gb2312 (GB2312 Chinese simplified: ISO-IR-58.)
 code point: 63 52
     syntax: w 	which means: word
   category: C:Chinese (Han) characters of 2-byte character sets   
             c:Chinese
	     |:While filling, we can break a line at this character.  
buffer code: 0x91 0xBF 0xB4
  file code: not encodable by coding system iso-latin-1
       font: -ISAS-Fangsong 
              ti-Medium-R-Normal--16-160-72-72-c-160-GB2312.1980-0

There are text properties here:
  gnus-number          104
  face                 gnus-summary-normal-ancient-face

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-- 
  character: В (07062, 3634, 0xe32)
    charset: cyrillic-iso8859-5
	     (Right-Hand Part of Latin/Cyrillic Alphabet 
             (ISO/IEC 8859-5): ISO-IR-144.)
 code point: 50
     syntax: w 	which means: word
   category: y:Cyrillic  
buffer code: 0x8C 0xB2
  file code: not encodable by coding system iso-latin-1
    Unicode: 0412
       font: -Misc-Fixed-Bold-R-Normal--14-130-75-75-C-70-ISO8859-5

There are text properties here:
  gnus-number          105
  face                 gnus-summary-normal-ancient-face