Changes on Cocoa picture handling in REAL Studio?

With our current 10.5 plugins the overlay example looks like this in REAL Studio 2010r3:

In REAL Studio 2010r4 the same code produces this pictures:

Maybe REAL Software decided to change the layout of the pixels, but I didn't notice a note about this.
As soon as REAL Software clarifies whether this is a bug (they'll fix it) or whether the changed it on purpose (we'll change plugins).