Is it?
EVE released an update today (as it does most Tuesdays, and also often the next day or two in the week if there are issues). Part of that update included significant changes to a number of blueprints, which are the plans needed to manufacture items in game. Blueprints come in two varieties: originals and copies, and you can perform various activities on them (manufacturing, research to improve efficiency, copying of originals to make copies, etc.). I wrote a tool which imports the game's Static Data Export (SDE) and makes various calculations about all of blueprints in the game (profitability, etc.), so I ran it on the SDE from the new update. Each 'activity' has a set of fields, like what it outputs, etc. But, the 'copying' activity is hard-coded to output blueprint copies. There is a field to say what it outputs (and that field is sometimes present in the data), but the value is always empty. Except today it was not always empty. A relatively obscure blueprint for a Taipan (a kind of upgraded rookie ship given away as a one-off in a past special event) apparently had the information for its 'manufacturing' activity listed as 'copying' instead. So now it claims that if you copy an original, you get the actual manufactured ship, and not a blueprint copy. This broke my tool, because I had put in a check to see if this field was ever non-empty, because if it was it might mean the game had changed in a way that meant something in my tool needed to be updated.
If you look at the information for the blueprint in game, it still claims that the copying activity outputs a blueprint copy. They hard-coded it, too. It now takes as input all of the materials required to manufacture the ship, though. In this case, there are no blueprint originals for a Taipan (if there were you could make an infinite supply of these one-off event items), and any copies that might exist can no longer produce the ship, because you cannot copy a copy. The only valid activites for a copy are 'manufacturing' and 'invention', except a Taipan blueprint no longer has a manufacturing activity and never had an invention one. So I updated my check to ignore this type, and moved on. Needless to say, this change was unrelated to any of the actual announced changes for the update, not mentioned in patch notes, etc. Just another Tuesday in EVE.
[1] https://wiki.eveuniversity.org/Taipan