Version:           4.1.00 (KDE 4.1.0) (using 4.1.00 (KDE 4.1.0), MS Visual Studio 2005 SP1)
Compiler:          cl.exe
OS:                Microsoft Windows (i686) release 5.1 (XP Home Edition)

"The requested operation could not be completed
Unexpected Program Termination
Details of the Request:
URL: http://www.kde.org
Protocol: http
Date and Time: Tuesday 26 August 2008 21:10
Additional Information: http://www.kde.org
Description:
The program on your computer which provides access to the http://www.kde.org protocol has unexpectedly terminated.
Possible Causes:
This is most likely to be caused by a bug in the program. Please consider submitting a full bug report as detailed below.
Possible Solutions:
Update your software to the latest version. Your distribution should provide tools to update your software.
When all else fails, please consider helping the KDE team or the third party maintainer of this software by submitting a high quality bug report. If the software is provided by a third party, please contact them directly. Otherwise, first look to see if the same bug has been submitted by someone else by searching at the KDE bug reporting website. If not, take note of the details given above, and include them in your bug report, along with as many other details as you think might help."

I had no plugins. To reproduce it, just simply click the "Home Page" button, or enter any URL.