TeamCity (2.1.1) does not like it if you modify the (SVN) URL of projects.
This is what happens:
- builds are constantly triggered, then immediately cancelled automatically, so that build counter goes up to something like 2000
- at some point some xml file seems to get corrupted (0x0 is not valid...)
to avoid this we now use the workaround to copy a project, then modify the svn url there.