I can confirm that it is still a problem on Kubuntu 64 Jaunty Beta.
Bus 005 Device 002: ID 046d:c508 Logitech, Inc. Cordless Trackball
[ 7.037030] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/input/input4
[ 7.060122] generic-usb 0003:046D:C508.0001: input,hidraw0: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:1d.0-2/input0
I can confirm that it is still a problem on Kubuntu 64 Jaunty Beta.
Bus 005 Device 002: ID 046d:c508 Logitech, Inc. Cordless Trackball
[ 7.037030] input: Logitech USB Receiver as /devices/ pci0000: 00/0000: 00:1d.0/ usb5/5- 2/5-2:1. 0/input/ input4 C508.0001: input,hidraw0: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000: 00:1d.0- 2/input0
[ 7.060122] generic-usb 0003:046D:
Any other info needed?