When you configure Windows Vista to use the High Contrast color scheme, some of the text in a Japanese program is not displayed in Japanese characters. Instead, this text may be displayed in English characters or in garbled or unrecognizable characters. When you restore Windows Vista to a default color scheme, the Japanese program displays text in Japanese characters as expected.
You experience this problem if you use the keyboard shortcut that enables the High Contrast color scheme. For example, you experience this problem if you press left SHIFT+left ALT+PRINT SCREEN to enable the High Contrast color scheme.