Publishing on Facebook failed

This is the error I’m getting when I publish my articles. "Publishing on Facebook failed".
It worked for the first posts. I didn’t install any plug-in meanwhile and didn’t change anything in facebook app.
I've read all the post with this similar subject and tried almost every suggestion.
The message in error log:
“10 de January de 2013 11:25 Username post_on_facebook exception CurlException: 60: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed”
Need some help here.
Thanks in advance