Also, since the problem now seems server-related, here's the version information about the server:
OS: CentOS 6.2 Subversion: subversion-1.6.11-7.el6.x86_64, mod_dav_svn-1.6.11-7.el6.x86_64 These are the latest versions from the repositories of CentOS. Is there a chance that if I install the latest SVN from sources the problem will be fixed? -- Andrew
