hp-setup - unable to installl hp2600n printer

Release: 12.10 (Quantal Beta1)
Package hplip:
  Installed: 3.12.6-3ubuntu1

I'm unable to install the drivers for the hp2600nn printer under Quantal. This used to work under 12.04 (I think). I have a clean install of 12.10 .

Ran hp-setup under sudo:
    sudo hp-setup -g

It detects the printer (as well as my OfficeJet printer). Both are net-connected.

When I select the printer to install, it offers to download the printer driver, and I accept. I get the license page, which I also accept.

The plug-in installation seems to succeed. The first time there was a dialog that it couldn't confirm the signature but I told it to go ahead anyway. However, after installing the plugin, it won't use it. The dialog box informing me reads:

The printer you are trying to setup requires a binary driver plug-in and it failed to install.
Please check your internet connection and try again.
Visit http://hplipopensource.com for more infomation [sic].

When running with debug logging, this message appears on stdout:

hp-setup[31795]: debug:
Done.

hp-setup[31795]: debug: Plug-in installation successful.

hp-setup[31795]: debug:
Done.

hp-setup[31795]: debug: Unable to open file /var/lib/hp/hplip.state for reading.
hp-setup[31795]: debug: Plugin is not installed
error: The printer you are trying to setup requires a binary driver plug-in and it failed to install. Please check your internet connection and try again. Visit http://hplipopensource.com for more infomation.

Note: there is no /var/lib/hp directory on my system.

However, after I ran 'mkdir /var/lib/hp', a subsequent attempt succeeded.

I'll attach the full log.