On yesterday's build (5/22) I've gotten a stack dump twice with the FBAalpha2012 core. BUT once I had padcon running and the GameCube adapter controller running at the same time so I think it was caused by that. It occured when trying to close content when playing Puzzle Fighter. Happened a second time but wasn't sure what caused it that time. Just thought I'd share since there was some discussion on that being GBA only a few pages ago.
Anyways, did the Wii U really just get netplay?!
Oh my lord that is amazing I need to test that out. Will try to get to my Wii u as soon as I can. Anyone that wants to try it with Puzzle Fighter or 3rd Strike let me know!!