KFileDialog replacing QFileDialog

[Jeremy Sanders]

I've filed a bug here listing problems when some part of the KDE/Qt system 
appears to be replacing QFileDialog (the Qt file dialog) with KFileDialog 
(the KDE file dialog) in my Qt/PyQt application: 
https://bugzilla.redhat.com/show_bug.cgi?id=570090

I've filed this under Qt, but maybe someone knows whether it is KDE doing 
this, and whether it is possible to turn off this (currently) buggy 
behaviour, at least for my application.

Thanks

Jeremy