Does anybody know where the old firmware archives are located for the APM2.5 controllers, prior to the last supported version, which is apparently 3.2.1? I got my new quad flying today with 3.2.1 on a APM2.5 board, and that firmware has more bugs than a warm august night. Bugs that were never fixed after the project got Code Bloat and transitioned to bigger (but not necessarily better) hardware.
I'd like to download the version prior to 3.2.1 to see how many of these bugs, like the EKF one, popped up with 3.2.1. And I'd also like to get the source code for it, as I'll fix what's wrong with it for my own use and rebuild it.