Headers problem

Hi. I'm new here, first of all, sorry for my horrible english...

I'm search in list archive and I found a reference to my issue: http://lists.dorkzilla.org/archive/roundcube-dev/2005Oct/0155.html

When I send an email to gmail (for example), it displays some headers in the body os message, and can't interpretate From field:

Date: Thu, 27 Oct 2005 14:05:23 +0000

From: Sergio =?ISO-8859-1?Q?=C1lvarez?= mail@miserver

Reply-To: Sergio@xergio.net, =?ISO-8859-1?Q?=C1lvarez?=@xergio.net

Message-ID: be59b37fa6e130cc01cd934323cd21eb@xergio.net

X-Sender: mail@myserver

User-Agent: RoundCube Webmail/0.1-20051021

Content-Type: text/plain; charset="UTF-8"

Content-Transfer-Encoding: 7bit

Whitch is the problem? It's mine or it's a "bug"'s RoundCube?

Thanks you!