The third test rebuild of Trusty Tahr was started this week for all architectures except powerpc (all components).
Results will appear at (currently this link doesn't yet exist)
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-2014030...
The archive for the test rebuild is https://launchpad.net/ubuntu/+archive/test-rebuild-20140307/
Additional build failures for packages in trusty-proposed (not yet in trusty) can be found at http://qa.ubuntuwire.com/ftbfs/
Please help fixing the build failures for the final release.
To prepare for the u-series, a second test rebuild using GCC 4.9 as the default is run in parallel in https://launchpad.net/ubuntu/+archive/test-rebuild-20140307-4.9/ The compiler used for this test rebuild can be found in the ubuntu-toolchain-r/test PPA.
Matthias