Subclipse: "An existing connection was forcibly closed by the remote host"

Subclipse "suddenly" stopped working, so I couldn't commit or synchronise to a svn repository anymore:

RA layer request failed
svn: Commit failed (details follow):
svn: OPTIONS of 'http://big-long-svn-path': Could not read status line: An existing connection was forcibly closed by the remote host.

Maybe a recent update of TortoiseSVN bolloxed it up, who knows... anyway, I worked around it by going to Team->SVN in Eclipse's preferences dialogue and changing the client in the "SVN Interface" section from JavaHL (JNI) to SVNKit (Pure Java). Works so far, although I had to re-enter the username/password which had been stored before.