Well, I'm using TortoiseSVN at work, in conjunction with AnkhSVN - plugin for Visual Studio 2003. Don't ask me why, I do NOT like SVN in first place but this is what old projects use in the company I work in. And lately I had to do some changes in old project, so installed TortoiseSVN 1.4.x and AnkhSVN 1.0.2. This worked just fine for a couple of months but today I have decided to upgrade Tortoise to latest version. Yes, blame me, I forgot that this is an Open Source project and they do NOT think about backward compatibility....