(Sorry, thought it was in some way related since you were talking about WHDLoad games not working. Should I have made a new thread instead?)
@SkulleateR : This is happening in the A600 environment. I am not using AmiBench for this.
It appears to only happen with new qames that are not in JST's list of supported games, where the AmiBerry logo appears before the game loads.
As stated before, the AmiBerry logo appears, then when attempting to load the game, after about 10 seconds or so it resets and the Guru Mediation style error box appears. I click the mouse button and it tries again with the same result.
Any new games I add where the AmiBerry logo appears, after the process it goes through of finding the WHDLoad slave file and then selecting which version of the game to run and any other options that may come up, once it attempts to load it shows the above symptoms before resetting with the guru error. And any previously added games where the AmiBerry logo appears, which were working before, now no longer work either.
Any games I add that are already in JST's list of supported games, where the AmiBerry logo does NOT appear, work without issue, so if AmiBerry is actually is used in every game, then it only appears to affect new games that are not in JST's list of supported games.
EDIT: I am on the latest firmware which ends in 1069 (can't remember the full version number off the top of my head).