Has Autodesk broken your old licenses?

I’m seeing multiple recent complaints from people stating that their older but perfectly legal perpetual license AutoCADs are being broken. They’re also reporting that Autodesk is being less than helpful about fixing the problem in any reasonable kind of timeframe. Whether this is a deliberate act or yet another “this won’t happen again” screw-up is difficult to determine, but either way it’s pretty obnoxious. People paid a lot of money for this software and they deserve to have it working. If you have an old release lying around for whatever reason, maybe you’d better check to make sure it’s not …