I just learned from Michael Kaplan's Microsoft internationalization blog, Sorting it all Out, that Windows 8 now includes a keyboard layout form the Burmese / Myanmar language and also a very nice looking Burmese / Myanmar font.
I know the Burmese / Myanmar writing system is of similar complexity to Khmer and Tibetan with challenges such as vertically stacking marks, differing logical and visual ordering of codepoints and glyphs, contextual glyph shaping, etc.
Often for a font to work well in a given OS the OS's rendering system (Uniscribe in the case of Windows) needs to specifically support the script / writing system. This is especially true if the script uses OpenType / FreeType features uncommon in previous scripts and/or fonts.
So does this new Windows 8 Burmese font work fully or partially on Windows 7? Does it require a newer Uniscribe version and if so does the Windows 8 Uniscribe work on Windows 7?