Is there still no support for SVN 1.6.x? If not, when will this be supported? Do the "beta" builds referenced in this thread work OK? I am very hesitant to upgrade to a beta.
Syncro SVN Client supports SVN 1.6 since version 4.2, released on May 15th 2009. Also, on the first page of the site this it's stated very clear. You can download a free fully functional trial version of Syncro SVN Client and test it from the Downloads section.