I don't know if this is normal, but I'm having a couple of issues with Mednafen within Retroarch, specifically with PSX emulation. In Retroarch, I map the buttons to my 360 controller through the settings menu, but certain keys are swapped, namely Cross and Square, and Triangle and Circle. It's not a huge barrier, but it is annoying. Secondly, Whenever I attempt a save state, I get the error "core does not support save states". I did have some issues setting up save states in MedGUI when I first tried Mednafen, but I know it definitely DOES support them.
What am I missing guys? I've never had any major issues with any other emulator/frontend before, and I really like the all-in-one solution of Retroarch, especially with the Xebra-like accuracy of the PSX core (Mednafen) with extra shader options.