acceleratedRendering bugs

[JJS]

i was playing a bit with the separate command you can use instead of 
acceleratedrendering (on Android mobile)

compositorTileSize,layerMode,compositorType,compositorCacheLimit

and noticed that setting compositorType to opengl for android causes the 
black out screen

i'm not sure yet about compositorTileSize what it does on speed

the compositorCacheLimit needs to be big like 64*1024*1024 for 64MB 
according calculation in the dictionary, if you set it small it gets 
slow updated

now i'm not sure if i need the separate commands to be set empty in the 
closecard (to prevent upshifting on other cards when using keyboard) or 
that setting the acceleratedrendering to false would be enough.

till now i set the accelerated rendering on and off depending if i need 
keyboard on the card


anyone else have experience with these commands?