Missing printers on wx.PrintDialog

Hi everyone!

We are finally migrating our old workstations with Xubuntu 9.04 to
Xubuntu 10.04, and in the process we're testing our in-house wxPython
application on the new systems.
Everything works nicely, except that wx.PrintDialog's popup shows NO
printers available, there's only a "Default printer" with empty
"Device" and "Status". This happens even with wxPython's PrintDialog
demo. What could I check out?

Thanks in advance!

(Xubuntu 10.04, wxPython 2.8.10.1)