If you have an old APM1 1280 that you still fly with ArduPlane, then this is your chance to ask that we keep support for it in the next release. We are now getting to the point where it is taking more effort to keep supporting this old board, and unless at least 10 people tell me that they are still flying ArduPlane with an APM1 1280, and they need the new releases then I will probably drop it for the next release.
Note that this doesn't affect the APM1 2560 boards. They will still be supported. I'm talking about the very old APM1 1280 boards that only have 128k of flash. ArduCopter dropped support for the APM1 1280 quite a long time ago.
Also note that the current ArduPlane releases already have significantly reduced features on the APM1 1280, for example geo-fencing is not supported, and auto compass declination is not supported. It also doesn't support dataflash logging.
So if you fly an APM1 1280 then speak up now! If enough people ask for it to be supported then I'll see what I can do, though it will take a fair bit of development effort, so please don't ask without good reason.