SSL problem failed (SSL: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch)

[AlexXF]

I've got this problem also, but solved!

There is a two files that gandi sent to you:
site.crt
site-bundle.crt

Use site.crt instead of site-bundle.crt. Nginx requires certificate for
exactly site only. So it is not require to use chain (bundle)
certificate file.

Enjoy!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,176163,218470#msg-218470