Local printer and scanner not connected with cups 1.4.3

[DLCBurggraaff]

Binary package hint: cups

Xubuntu Lucid + Nautilus + Gedit

See the attached screenshot.
Before the latest cups update (1.4.3) I had the Local Printers 4th entry (HP LaserJet 3020 USB 00CNBF091211 HPLIP (HP LaserJet 3020)) selected. Printing and scanning (xsane) was ok.
After the update the printer status stayed "not connected". I had to delete the printer and add a new one using the 3rd entry (HP LaserJet 3020 (HP LaserJet 3020)) to be able to print again.

Now I find that I can no longer scan. Xsane (and scanimage) give a "open of device hpaio:/usb/hp_LaserJet_3020?serial=00CNBF091211 failed: Error during device I/O" message. This looks like the printer problem, but I have no clue on how to redefine the scanner :((

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: cups 1.4.3-1ubuntu1.2
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
CupsErrorLog: E [11/Jul/2010:12:11:09 +0200] Unable to remove temporary file "/var/spool/cups/tmp/.hplip" - Is a directory
Date: Sun Jul 11 16:58:42 2010
Lpstat: device for hp_Laserjet_3020: usb://HP/LaserJet%203020
MachineType: System manufacturer P5Q
Papersize: a4
PpdFiles: hp_Laserjet_3020: HP LaserJet 3020 3030 Postscript (recommended)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz root=/dev/sda7 ro
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: cups
dmi.bios.date: 07/10/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1004
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5Q
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1004:bd07/10/2008:svnSystemmanufacturer:pnP5Q:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5Q:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5Q
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[DLCBurggraaff (burdi)]

When I boot Karmic on this machine printing and scanning is ok.