REST API Changes
Several objects got additional attributes and sub-elements (e.g. "startDate" in reference to a build, "personal" in a change). Please check that your parsing code still works.
Changes from 6.0.1 to 6.0.3
No noteworthy changes
Changes from 6.0.1 to 6.0.2
Maven and XML Test Reporting Load CPU on Agent
If you use Maven or XML test reporter and your build is CPU-intensive, you might find important the known issue. Patch is available, fixed in the following updates.
Visual Studio Add-in and Perforce
There is critical bug in TeamCity 6.0 VS Add-in when Perforce is enabled. This can cause Visual Studio hangs and crashes. The fixed add-in version is available. (related issue). The issue is fixed in TeamCity 6.0.1.
Error Changing Priority class
You may encounter a browser error while changing priority number of a priority class. A putch patch is available in a related issue. The issue is fixed in TeamCity 6.0.1.
IntelliJ IDEA Compatibility
IntelliJ IDEA 6 and 7 are no longer supported in TeamCity plugin for IntelliJ IDEA.
Java older than 1.5 is no longer supported by the agent part of Maven runner. Please make sure you specify 1.6+ JVM in Maven runner settings or ensure JAVA_HOME points to such JVM.
NUnit and MSTest Tests
If you had NUnit or MSTest tests configured in TeamCity UI (sln and MSBuild runners), the settings are extracted form the runners and converted to a new runner of corresponding type.
REST API Changes
Several objects got additional attributes and sub-elements. Please check that your parsing code still works.
Perforce Clean Checkout
All builds using Perforce checkout will do a clean checkout after server upgrade. Please note that this can impose a high load on the server in the first hours after upgrade and server can be unresponsive while many builds are in "transferring sources" stage.
Changes from 5.1.2 to 5.1.3