Annoying.  If, like me, you’re suddenly seeing this (despite assurances that it’s been fixed), I have two recommendations:

1. Revert to an older TortoiseSVN 1.4.x build if you can find it.
2. Try SmartSVN

SmartSVN is a Java-based free and “pro” drop-in replacement for Tortoise.  Unlike other SVN clients, you can use it exactly as you were using TortoiseSVN.  Possibly not as feature-rich, but considerably more polished than our favorite old Testudine.  Runs everywhere.  And it works over svn+ssh.