Upgrading WordPress & SSL with Nginx

We’re running WordPress with Nginx all on SSL.

I just tried to upgrade to 3.5.2 and when I went to update sites I got:

Warning! Problem updating https://teachersh.scis-his.net/hqtransitions5-6. Your server may not be able to connect to sites running on it. Error message: SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

It seems that something is wrong with my SSL cert even though Firefox, and Chome and IE seem ok with it.

My config file contains:

server {

        listen 443;
        ssl on;
        server_name shteachers.scis-his.net ;

        ssl_certificate /etc/ssl/combined.crt;
        ssl_certificate_key /etc/ssl/*.scis-his.net.key;
...

What could be wrong? I know I could hack the update.php file, or write an mu plugin, but I’d rather not do something that goes around verifying the SSL cert.

My Cert comes from Godaddy BTW.