Bug#743554: Proposed Fix

[Ole Streicher]

Hi Scott,

As you can see on the upstream report [1], I am afraid that this exposes
a real bug somewhere in writing or reading FITS files or in the checksum
calculation. Since this may lead to data loss, I don't want to make
0.3.1 enter testing unless I get a clear response that everything is OK
here, so that they close the issue. astropy-0.4 is on the way during the
next month anyway, and 0.3.2 is finallizing, so I hope that there is
something in there.

Please no NMU here unless there is a clear confirmation from upstream.

Best

Ole

[1] https://github.com/astropy/astropy/issues/2171#issuecomment-36975379