I'm curious also.
Seen that word "regression" before in the change logs.
There might be some regression issues with older titles, please report any problems.
The Swedish translation of that word makes no sense to me.
a defense mechanism in which you flee from reality by assuming a more infantile state
the relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x)
returning to a former state
I can only see that it would be the last one that some old solved problems that occur again - an introduced bug in the previous version of the program that now is fixed.