I'm getting a connection timed out error with SVN after installing OS X Yosemite
The problem was the client I normally use (Versions) has a crash bug in Yosemite.  The fix for that, which I carried out yesterday, is here: Versions crashing in OS X Yosemite

That fix has the side effect of breaking SVN (but it stops the Versions crashes!).

Reverting the change gets rid of the error message I was seeing.