I don't know. I also use PPTP under KDE daily.
When I clicked on the connect button, it failed with this warnings. I
don't know why it didn't tell me the missing yesterday. And yesterday
it was smooth and fine.
But I did a yum update yesterday.
kde-plasma-nm-0.9.3.2-1.fc21.i686.
yum history:
http://ur1.ca/g3ebn