No, I have never used Gonvert or ejpi. Glad to hear you trying find a solution.
This issue was due to some dependency/promotion issues which left PyQt in a half-promoted state. An update has been made some three weeks ago (during the conference and everything should be dandy after that. If not, the user should apt-get update to the latest PyQt (the problem is that the application manager might refuse to pull in all dependant packages and instead opt not to install the application).