I noticed that the \hbar glyph (U+210F) is rendered incorrectly on Acrobat Reader 9 on Linux.
At a resolution up to 400% there is white spot in the middle of the crossing between stem and bar.
At a resoluition of higher than 400% the glyph is rendered correctly.
I suspect that there may be a problem of even-odd filling as the bar is just overlaid on top the step
and the glyph is not drawn in one piece.
I noticed that the \hbar glyph (U+210F) is rendered incorrectly on Acrobat Reader 9 on Linux. At a resolution up to 400% there is white spot in the middle of the crossing between stem and bar. At a resoluition of higher than 400% the glyph is rendered correctly.
I suspect that there may be a problem of even-odd filling as the bar is just overlaid on top the step and the glyph is not drawn in one piece.