I’m unable to merge over HTTPS:

$ svn merge https://x.unfuddle.com/svn/x_unity/trunk/authoring-desktop2
svn: REPORT of '/svn/x_unity/!svn/vcc/default': Could not read chunk size: Secure connection truncated (https://x.unfuddle.com)

Doing the same merge over HTTP works fine. However, on accounts with force-HTTPS this cannot be done.