Glad to hear it works! I was able to pinpoint the problem (in case you are interested

)...
In this particular scenario, the web server that your SVN client sees is accessible via https. But the web server is in fact a reverse proxy, that is funneling the request back to an Apache server that is not running SSL (since it's running local only). The COPY/MOVE commands from the SVN client are supplying a Destination header of
https://.../. Our proxy needs to modify this header (to
http://.../), otherwise Apache will barfs with a 502 Bad Gateway error.
Working on a fix...