Comment 6 for bug 888757

It might be specific to the keyboard I use.

I have an USB keyboard from Logitech, lsusb says:
Bus 002 Device 003: ID 046d:c30e Logitech, Inc. UltraX Keyboard (Y-BL49)

My keyboard has six extra keys, one of them with a "home" icon on it, which I want to assign to launch home folder.

This key is described as follows by xev:
KeyPress event, serial 34, synthetic NO, window 0x4c00001,
    root 0x1ad, subw 0x0, time 4362256, (141,103), root:(142,156),
    state 0x0, keycode 180 (keysym 0x1008ff18, XF86HomePage), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

I open System Settings, go to Keyboard, Shortcuts, Launchers. There I select "Home folder" and press this key, the key is named "HomePage". Then when I press this key, the home folder icon in the Unity launcher flashes for a few seconds and this is written to ~/.xsession-errors:
Could not parse arguments: Unknown option --browser