Perhaps something to do with this? (I thought everyone with write access to the hg repo was sent such a mail):
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Your code repository in upgraded project hugin is now ready for use.
Old repository url: http://hugin.svn.sourceforge.net/svnroot/hugin
New repository checkout command: svn checkout --username=username svn+ssh://user...@svn.code.sf.net/p/hugin/code/ hugin-code
You should do a checkout using the new repository location. The old repository is read-only now.
For more detailed instructions on migrating to your new repo, please see https://sourceforge.net/p/forge/community-docs/Repository%20Upgrade%20FAQ/