Description of problem:
Using the lpinfo -l -v output from bug #512884 (see attachment #354897 [details]), I get this:

$ ~/devel/system-config-printer/check-device-ids.py 'HP DeskJet 959C' 'MFG:HEWLETT-PACKARD;MDL:DESKJET 950C;CLS:PRINTER;SN:ES11T1901WDF;'
Installing relevant drivers using session service
Ignoring exception: org.freedesktop.PackageKit.Modify.Cancelled: did not agree to download
Fetching driver list
└── HP DeskJet 959C: MFG:HEWLETT-PACKARD;MDL:DESKJET 950C;
    ├── foomatic:HP-DeskJet_950C-hpijs.ppd [/usr/lib/cups/driver/foomatic]
    ├── gutenprint.5.2://hp-dj_950c/simple [/usr/lib/cups/driver/gutenprint.5.2]
    ├── gutenprint.5.2://hp-dj_950c/expert [/usr/lib/cups/driver/gutenprint.5.2]
    ├── drv:///hp/hpcups.drv/hp-deskjet_950c.ppd [/usr/share/cups/drv/hp/hpcups.drv]
    ├── foomatic:HP-DeskJet_950C-cdj550.ppd [/usr/lib/cups/driver/foomatic]
    └── foomatic:HP-DeskJet_950C-pcl3.ppd [/usr/lib/cups/driver/foomatic]
        MISSING  gutenprint.5.2://hp-dj_959c/expert [/usr/lib/cups/driver/gutenprint.5.2]
        MISSING  drv:///hp/hpcups.drv/hp-deskjet_959c.ppd [/usr/share/cups/drv/hp/hpcups.drv]
        MISSING  gutenprint.5.2://hp-dj_959c/simple [/usr/lib/cups/driver/gutenprint.5.2]
        MISSING  foomatic:HP-DeskJet_959C-hpijs.ppd [/usr/lib/cups/driver/foomatic]

Version-Release number of selected component (if applicable):
gutenprint-5.2.5-5.fc13.x86_64