Comment 8 for bug 1576742

Yes, that's the problem - I tweaked gui_pubdate_display_format = "MMM yyyy". Reverting to "dd MMM yyyy" solves the issue. Of course, it's still a bug, since how the date is displayed should not effect it's underlying value, and only when it's a February date in a non-leap year (and only since recent updates). Thanks for your help in locating the source of the problem.