I just successfully updated our Subversion server to 1.7.2. This version has a LOT of changes. Please update your Subversion client software, as I've changed the format of the repositories. Older clients will not work properly. I personally use TortoiseSVN and AnkhSvn.

TortoiseSVN - tortoisesvn.net/downloads.html

AnkhSvn - ankhsvn.open.collab.net

Thanks,

Your invisible and friendly system administrator.