Perhaps somebody has similar problems which we had the last days after upgrading to the new v6 of kaspersky.
We use subversion and a apache2-server as the repository for our sourcecodes - everything works fine, expect renaming/copying "suddenly" doesn't work - Error 400 - Bad request appears after several minutes (timeout?).
First we thought about version conflicts between the clients (SVN 1.4.x) and the server (SVN1.3.1) so we upgraded the server without any effort. After several tcpdump/-flow tests, we found the new option "Scan HTTP traffic" of the "Web Anti-Virus" as the reason for this behaviour - if we uncheck the option, everything works fine, so we went further and found as a better solution to add svn.exe, TortoiseProc.exe and TSVNCache.exe as Trusted Applicatons (Do not scan ALL network traffic at SELECTED remote host APACHE2_HOST_IP and at SELECTED remote port 80). With this exclusion, we can check "Scan HTTP Traffic" still everything works fine and we think, that the danger of a virus is minimal when excluding the network-traffic of the selected applications to the repository-server.
Hopefully, this can help somebody ...
Steff