As a side-effect of the change to support
http://track.pmease.com/browse/QB-3070, it appears that the "Checkout" build step now fails unexpectedly with the following error in some circumstances:
21:46:34,064 ERROR - Step 'master>sync' is failed: File already exists: /workspace/tools/windows/libs/win-x86/Test.dll
It seems to me that, if the "Publish" step optionally supports this sort of collision detection, so too should the "Checkout" step.
https://build.pmease.com/build/4380/build_overview