Comment 40 for bug 499113

I found another opacity and anti-aliasing related artifact. When I use 'Arial Black' font (about 18px size) together with opacity less than 1.0, the text appears a bit thinner (as if it had smaller font-weight). With larger font size the visual difference becomes less. Without anti-aliasing the text rendering doesn't change because of the opacity, but with 'standard' anti-aliasing the similar artifact still appears (so it may be not only ClearType-related problem). I didn't investigate if this happens to other fonts yet.