SOGo Webmail inserts full name of the sender and recipients of the message into quotes.
When recipient of that message wish to forward it and uses "Forward" action, SOGo opens new window and inserts part of the header and text of the message into it.
Like:
-------- Original Message --------
Subject: Test
Date: Tuesday, July 19, 2011 21:24 CEST
From: "Mr. Frank McIntosh" <frank@mac.cz>
To: "Ing. Peter Pan" <peter@zcu.cz>, "Harry Potter" <harryp@zcu.cz>

When recipient selects some of that addresses included quotes by the mouse and inserts them via Copy&Paste into "To:" field, SOGo writes them into "To:" with the quotes.
Like:
To: "Ing. Peter Pan" <peter@zcu.cz>, "Harry Potter" <harryp@zcu.cz>

But by sending this message SOGo changes format of "To:" and covers these addresses into next quotes somewhat strangely, like:
to: ""Ing. Peter Pan" <peter@zcu.cz>, "Harry Potter"" <harryp@zcu.cz>

And then send this message to first address only :-(

In fact - recipient use correct way, select correct addresses and use them via Copy&Paste, but SOGo send his message to first recipient only and nobody knows about it.
(Two our users have conflict with each other from this reason and I discovered it)

Thanks,
Milos