I have this problem as well, except I just installed WPbook.
I followed the detailed instructions to setup the plugin settings as well as the facebook developer page.
I have this problem posting anything, not just photos and have yet to get a post on my FB wall. I’m thinking I have some settings wrong.
Most things look exactly the same as the instructions in the plugin settings except the ‘Stream publishing option’. I have custom urls on fb so I cannot find the # ID anymore. When I click ‘grant permission for this user’ it gives me an error:
API Error Code: 114
API Error Description: Invalid user id list
Error Message: must be a valid ID string (e.g., “123”)
that’s the only thing that seems iffy on the plugin side. On the FB developer side, everything seems to be working ok, when i type in the aps.facebook.com link, it brings me to the fb link with my blog imported.
Please help!