Previously, I used:

if ( bmp.valid() )

to verify that Document->render...() created a valid bitmap. With 3.0, Bitmap::valid() returns false if the bitmap exists whereas previously it returned true. It took me a while to find the problem, and I see that valid() is documented as deprecated but not marked as such. It certainly should not be used in it's current form since the correct check would now be:

if ( !bmp.valid() )

I.e., if valid returns false then the bitmap is valid.

Could this be either reversed back to it's original meaning so it doesn't break existing code, or marked as deprecated so that at least there is a compiler warning when using it?