[Magick-bugs] Strange Inverse Result [OSX Snow Leopard]

[Billy Bo]

I've just managed to test my issue on a Windows XP machine. The problem here seems worse.
Running the same command but using the letter 'A' instead of '+' renders a completely black image.
Further testing proves that more symbols render out a black image. If I change the output format to PNG, the result is correct.
I hope this helps.Thanks.
Version: ImageMagick 6.5.6-10 2009-10-08 Q16
Command: convert -background black -fill white -font Arial -pointsize 40 label:A test.tiff