Fedora 7 has lost konqueror

[J Bufton]

After updating and adding packages using yumex, konqueror no longer 
wants to work. This was updating from the standard redhat repositories. 
If I try to run it from konsole I get the following error:

konqueror: symbol lookup error: /usr/lib64/libkdeinit_konqueror.so: 
undefined symbol: _ZN9KLineEdit17mouseReleaseEventEP11QMouseEvent

(The file referenced is there)

Below is the information on the RPM package I have installed that is 
suppose to install konqueror

RPM Group    : User Interface/Desktops
Source       : kdebase-3.5.7-13.fc7.src.rpm
Yum Group    : Desktop Environments/KDE (K Desktop Environment)
 -> Type     : Mandatory
Build Time   : Fri Aug 17 18:45:40 2007
Install Time : Tue Aug 21 08:56:03 2007
License      : GPLv2

I've even tried reinstalling the above package without any joy!

Any help would be appreciated

JB