tinyMCE / SSL/ HTTPS problems

I’m having the ever-present “tinymce popups are blank” issue, and I’ve tracked it down to tinyMCE not properly adjusting for my back-end URLs, which are HTTPS. My users login via an LDAP plugin.

Here’s what I’ve tried:
-Upgraded tinyMCE manually
-Checked the tiny_mce_config for https bugfixes (they’re already in there)
-the tinyMCE advanced pluging (no success)
-the config cache fix (nothing)

Thanks to safari’s error console, I realized that this error was the heart of the problem:

Unsafe JavaScript attempt to access frame with URL https://[omitted]/wp-admin/post.php?action=edit&post=568 from frame with URL https://[omitted]/wp-includes/js/tinymce/themes/advanced/link.htm?v=307. Domains, protocols and ports must match.

I went and manually changed the URL of my edit page, and tinyMCE sprung right to life.

Any ideas, either for fixing tinyMCE (which seems to already attempt to compensate) or is there something else in my back end that’s preventing tinyMCE from initializing properly coming out of the https login screen?