[SyntaxHighlighter Evolved] Dysfunctional javascript box in NGINX

Hi.

I am running WordPress 3.8.1 on NGINX 1.4.4. Until recently, I was using Apache 2.4. Since changing, the SyntaxHighlighter Evolved (version 0.7.8.4) popup box that appears when clicking the ‘pre’ or ‘code’ TinyMCE button in the Visual Editor, is empty and unresponsive. The box appears, but the usual data entry fields and drop-down box to select which language to use are missing; it’s just a blank white screen. There are no relevant entries in either NGINX error or access logs. I am using the same browser, without any changed settings, as when running WordPress on Apache. In fact, everything is the same except for the HTTP daemon and SSL protocols.

Surely I am not the only WordPress on NGINX user who has experienced this problem. How do I fix it?

n.b. I am accessing WordPress admin over SSL, using a 3072-bit RSA certificate and 4096-bit Diffie-Hellman parameters. However, even when accessing wpadmin over SSL using a 2048-bit RSA cert and no DHE (as when I was using Apache), I experience the same problem. It’s worth noting, that when using SyntaxHighlighter’s ‘pre’ button on Apache, the padlock icon in Firefox’s address bar would change to a shield icon, and I would have to click this icon and select disabling protection as, by default, it would disable SyntaxHighlighter’s javascript box. After disabling the protection, the page would reload, I would then click the ‘pre’ button again and it would operate without a problem. No such behaviour with NGINX: just an empty, unresponsive popup box.