real vs. synthesized half-width and third-width glyphs for use with Japanese tatechuyoko

Screenshots showing real and synthesized half-width and third-width glyphs for use with tatechuyoko in Japanese vertical text runs.

Testcase: http://people.mozilla.org/~jdaggett/tests/width-testing.html
Note: requires Kozuka Mincho Pr6N (Adobe), Hiragino Mincho ProN (Apple/DaiNippon), MS Mincho (Microsoft).

All tests done with Firefox under OSX 10.8 (except for the IE10 sample which was taken on Windows 7).