You can reducethe display brightness. This helps a bit and is still bright enough. Normally I come through the day but it's sometimes tough.
Try this: Delete the apps, restart your PlayBook and then reinstall the apps. Let us know how that works.
BTW: Check for any os updates
i did not find one which supports
I just received a new PlayBook from BlackBerry, and I've noticed that the following apps just show a blank black screen when launched:
Reset it to factory settings, that might help.
Asterisk (Votes: 4)
Orb (Votes: 1)
Splat (Votes: 4)
Star (Votes: 0)
Spark (Votes: 8)
Something else (Votes: 3)