[1.4.19] email-address from LDAP addressbook is not properly quoted

When I'm retrieving an address from LDAP, then the realname containing an
Umlaut not being properly quoted.

I retrieved the message below with "less" from the Sent-folder:

--- snip ---
Date: Thu, 23 Jul 2009 10:19:26 +0200
Subject: Test michael.roemer@...
From: "Ralf Hildebrandt" <ralf.hildebrandt@...>
To: =?iso-8859-1?Q?R=F6mer=2C_Michael?= <michael.roemer@...>
User-Agent: SquirrelMail/1.4.19
MIME-Version: 1.0
Content-Type: text/plain;charset=iso-8859-1
Content-Transfer-Encoding: 8bit

Und nochmal mit LDAP Adressbuch
--- snip ---

As you can see =?iso-8859-1?Q?R=F6mer=2C_Michael?= translates to
Römer, Michael
instead of the correct form
"Römer, Michael"

The interesting thing is that (see PNG here: http://www.arschkrebs.de/roemer.png )
the compose screen actually displayed:

"Römer, Michael" <michael.roemer@...>

WITH the correct quotes around the realname but in the Sent-Folder it
looks differently. Even using SquirrelMail to look in the Sent folder I'm
getting:

An:     Römer, Michael <michael.roemer@...>

again, without the quotes.

So where have the quotes gone? Something is stripping the quotes away
in the To: field. If I copy the To: field into the Subject: field, the
Quotes are preserved!

SquirrelMail 1.4.19 on Linux
  Installed Plugins
      1. translate
      2. squirrelspell
      3. newmail
      4. sent_subfolders
      5. message_details
      6. delete_move_next
      7. abook_import_export
      8. addgraphics
      9. attachment_tnef
     10. compatibility
     11. cookie_warning
     12. folder_sizes
     13. avelsieve
     14. ldapquery
     15. pupdate
     16. vlogin
     17. verify_reply_to
     18. vacation
     19. unsafe_image_rules
     20. todo
     21. squirrel_logger
     22. change_pass
     23. calendar
     24. calendar_sql_backend
     25. view_as_html
     26. address_add
     27. bounce
     28. naguser
     29. filters
     30. mailnotify
     31. quicksave
     32. timeout_user
     33. check_quota
     34. lockout
     35. show_user_and_ip
     36. smime
           

------------------------------------------------------------------------------
-----
squirrelmail-users mailing list
Posting guidelines: http://squirrelmail.org/postingguidelines
List address: squirrelmail-users@...
List archives: http://news.gmane.org/gmane.mail.squirrelmail.user
List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users