Comment 8 for bug 1462755

Setting the task for a whishlist item, since it is essentially a config change that breaks it (as Mark said 'shot oneself in the foot'.

I'm personally not so keen about on-upgrade detection+warning since that (in general) has a history of too many false-positives leading people to config-break their system without a reason.
But then as I read Mark this is due to Debian intentionally changing some encodings, so maybe it should be done ...