Gruff tests produce transparent texts

[Uwe Kubosch]

Hi!

For a while now, we get semi-transparent texts in some of our tests in Gruff.

It only happens when using RMagick4J, not RMagick.

I have traced the error to Draw#fill= where a value of 'white' will give a transparent text, and '#FFFFFF' will give a correct white text.

Any idea why this could be?

Maybe you can run the Gruff tests and see if you can get the same result?