We're having a problem where engineers run pre-tested commit personal builds, using the Visual Studio addin with VS2010 and VS2012. the build runs, it appears to be successful but the changes are never committed. No error is returned to them via the addin or in the TeamCity.
The same engineers can rerun the personal builds and they commit, other engineers can and they run correctly as well. There seems to be no constent symptom.
We are running TeamCity 8.1.2 on Windows, but we also saw the problem in 8.0.5. This is mostly a Windows configuraiton with Windows Server 2008 R2 as the TC server, and Windows 7 x64 on engineers desktops. The SVN version is 1.6.x.
I'd appreciate any help in understanding how to further diagnose and troubleshoot this problem.