KPPP crashed when tried to delete modem created before

[yunusf9 tester]

Hi

Each time I want to delete modem I created before using "KPPP
Configuration - KPPP" window (Modems tab), I got "KPPP-The KDE Crash
Handler" window message (see below for the message contain on the
window)
-----------------------------------------------------------------
A Fatal Error Occurred

The application KPPP (kppp) crashed and caused the signal 11 (SIGSEGV).
Please help us improve the software you use by filing a report at
http://bugs.kde.org. Useful details include how to reproduce the error,
documents that were loaded, etc.
------------------------------------------------------------------

[yunusf9 at yunix ~]$ yum list kdenetwork
Loaded plugins: priorities, refresh-packagekit
Installed Packages
kdenetwork.x86_64     7:4.1.2-2.fc9          installed       
[yunusf9 at yunix ~]$

Is this known issue?

Thank you
yunus

==environtment==
Desktop : GNOME, KDE, XFCE
Laptop  : Acer TravelMate 6291
OS      : F9
Dial-up tools:
	KPPP,system-config-network, wvdial,
	NetworkManager (works when SELinux in permisive mode) related to ?
---https://bugzilla.redhat.com/show_bug.cgi?id=465764
Modem   :HUAWEI HSDPA/UMTS/EDGE/GPRS/GSM E220 USB MODEM