really strange function errors

[Trass3r]

Getting a bunch of strange errors, anybody got an inkling what the cause  
might be?

Error: function Sprite.size () is not callable using argument types () <-  
wtf?

Error: function Sprite.getPixel (uint x, uint y) is not callable using  
argument types (uint,uint) const

Error: function Sprite.rotation (float angle) is not callable using  
argument types ()
-> even though there is a rotation()!