  We present an independent cosmic shear analysis of the non-cosmological
B-mode distortions within the public first year data from the Dark Energy
Survey (DES). We find no significant detection of B-modes in a full tomographic
analysis of the primary METACALIBRATION shear catalogue. This is in contrast to
the secondary IM3SHAPE shear catalogue, where we detect B- modes at a
significance of $\sim 3\sigma$ with a pattern that is consistent with the
B-mode signature of a repeating additive shear bias across the survey. We use
the COSEBIs statistic to cleanly separate the B-modes from the gravitational
lensing signal (E-modes). We find good agreement between the measured E-modes
and their theoretical expectation given the DES cosmological parameter
constraints.
