Comment 2 for bug 521909

I have the same problem only with an HP photo-smart 4500 and Ubuntu 10.4, I had hoped that upgrading from 9.10 would cure this problem but no joy.
Again it works fine over USB.
avai is running.
Spooled jobs print at once when the USB cable is connected, but not over Wi-Fi.
Have tried installing all HP add-ons.
Any ideas?