Well, like kambone, I upgraded to 3.5.2 this morning. I'm using Firefox. Don't think it's the browser.
Using "inspect element" (right click FB link to personal account on Publicize settings page) I can see how the code differs (the rest of my multi-sites are already posting to the FB page so I can also see the correct code), can even change it, but haven't found a way to save the changes . . .
I'm not cool enough to know how to access the same bit of code in an editing screen. But I know I didn't go through all that before when I set this up for the other sites.
When I do the publicize setup it brings up a window with a section where my Facebook pages should be shown but they're not. Same problem for kambone and harborseditor?