after 3.1 update, screen going to sleep

Same here. It's really annoying. As a guitar player, I frequently need to change patches in mid-song (clean for verse, overdriven for chorus). It's annoying to have to wake the screen first, then hit (not just the down arrow, but) [CMD]-down arrow to get to the next patch.

It would also be nice to be able to customize key commands without locking up the majority of the interface.

Same here.

I hope they'll fix it.

You can obviously disable the screen saver/sleep in the Energy/Screensaver settings. That fixes it for now.

Or, if you don't want to disable it completely, you can assign a hot corner to disable screen saver and/or sleep. Of course, if you move your mouse out of that corner….

I see the same problem.I would be nice if Mainstage had a settings for not let the display sleep in perform mode.

yes!!!