Comment 85 for bug 552227

the only thing that worked for me was comment #80 as follows:

"
for those who have issues on ubuntu 10.4, do the following:
open terminal
type: rm -r ~/.gconf/apps/gwibber and hit enter
open system monitor and kill any gwibber process
reload gwibber and proceed to add facebook
...when you login to facebook on gwibber to authorize it use your username not your email
it should then say PERSON is authourised instead of facebook authorised
and the add button should appear, if you can't see it maximize the window.
"