I just started having trouble with this after using EasyApache to update to Apache 2.4.9. Self-signed SSL certs were working fine before that, on 2.4.7 and before. Deleting the self-signed certs resolves the apache start issue. I always use WHM's SSL tools, so I'm not setting anything up manually for any of this.
Just installed StartSSL certificate on my debian wheezy, nginx 1.6 server.
Everything seem to be working fine, I can browse the website in https no problem until I try to login...
IE works fine and I can login to OK.
Chrome gives me this error: Error code: ERR_SPDY_PROTOCOL_ERROR
Firefox just hangs and does nothing.
When I scrap the StartSSL cert and use selfigned cert everything works fine again