[PyKDE] Thread Problem with setCanvas method

[Miller, Douglas]

No matter whether I use the Python API or the Qt API for threading, I get
an error when calling methed setCanvas(None) from a thread other than the
main. The error is: 'pure virtual method called'.  Then the script aborts.
I use setCanvas(None) because it is the only way to make canvas objects
destruct.

I'm using Qt 3.0.3, PyQt/SIP 3.4.

Thanks for any help!