Run Font2DTest on Linux RH AS 3, Ja locale, select "Enclosed CJK Letters and Months" as Range, some symbols are missing in DialogInput, MonoSpaced and Serif fonts.

Noticiable code point 3231, which is a rather polular character in Japanese, displayed with a different character in the above three fonts, it displayed correctly in Dialog and SansSerif fonts.

This can always be reproduced in RH AS 3, with the promotion build b26 as well as the PIT build /net/jano/export/disk12/i18n/NightlyBuilds/archives/2005-03-10.mustang
###@###.### 2005-03-12 01:20:44 GMT

This is not a regression, as it can also be reproduced in tiger (1.5) and tiger update releases (1.5.0_03); in 1.4.2, there aren't any glyphs available in the same range (u3200 +).
###@###.### 2005-03-14 18:39:56 GMT

I did some investigation on this. Our support for Linux is only for JIS X 0201 and JIS X 0208, not for JIS X 0212.
Within JIS X 0208, the range from 2D21 ~ 2D7E is the one which depends on font. This range often causes trouble because of the dependency of font. So Shinya's comment is correct on this.

But if in case this range is provided by the fonts, how to check if it's Java's bug or not?
It's better to check if these characters can be displayed by using native API.
###@###.### 2005-03-29 00:44:08 GMT