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Document Viewer:

1 Answer
It is a known issue that the Evince Document Viewer does not support subpixel rendering.
Do a Google search for evince subpixel rendering.
The explanation
Well, actually the problem is not that patches are not good enough, the problem is that it's not possible to enable subpixel-hinted rendering without breaking transparencies. For subpixel-hinted rendering to work we would need to first fill the surface in white and then call poppler_page_render to render the page, but PDF blend modes need an initially transparent surface to work. We consider blend modes more important than subpixel-hinted rendering of fonts. There are patches to use to enable subpixel rendering. It is possible to apply them, even if you are not a programmer.