Version:           4.3 (using 4.3.5 (KDE 4.3.5) "release 0", openSUSE 11.2)
Compiler:          gcc
OS:                Linux (x86_64) release 2.6.31.12-0.2-desktop

Steps to reproduce:

1. Open the Preferences dialog.
2. Click on the dialog help button (?).
3. Click on the Phone externa script field.
4. Follow the hyperlink to suggest a description.
5. Follow the instructions and send.

Actual results:
3. The dialog box shows a tooltip window with a hyperlink to suggest a description.
4. Kmail creates a new message with data and instructions.  
5. The mail bounces.

Attachment: the bounced message.

Hi. This is the qmail-send program at ktown.kde.org.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<kde-usability-issues@kde.org>:
Sorry, no mailbox here by that name. (#5.1.1)

--- Below this line is a copy of the message.

Return-Path: <giecrilj@stegny.2a.pl>
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        by shark.2a.pl (Postfix) with ESMTP id E654D2A6BA0
        for <quality-whatsthis@kde.org>; Tue,  4 May 2010 20:15:14 +0200 (CEST)
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From: Krzysztof =?utf-8?q?=C5=BBelechowski?= <giecrilj@stegny.2a.pl>
To: quality-whatsthis@kde.org
Subject: What's This submission: kaddressbook
Date: Tue, 4 May 2010 20:15:14 +0200
User-Agent: KMail/1.12.4 (Linux/2.6.31.12-0.2-desktop; KDE/4.3.5; x86_64; ; )