the test test_WaveToy2D in WaveToy2DF77 in the CactusExamples arrangement fails for me (with a [mostly] clean checkout):
WaveToy2DF77: test_WaveToy2D Failure: 7 files compared, 6 differ, 6 differ significantly
attached are diff log and one of the data files. This happens with current trunk.
It looks to me as if I am seeing poison.