Hi Cil,
thanks for this bug report!
May you please try to reproduce this failure with a newer version of
MAT? E.g. if you're running Debian, MAT 0.5.2 is available both in
Jessie and in wheezy-backports.
Also, if you can reproduce with MAT 0.5.2, then I would advise filing
a ticket at
https://labs.riseup.net/code/projects/mat/issues so that
this bug doesn't fall through the cracks :)
Cheers,
--
intrigeri