[XeTeX] Bug or design flaw in Polyglossia 2012/04/29 v1.2.1

[Ian-Mathew Hornburg]

\latinfont will likely attempt to select a font set up for the actual
Latin language, since that’s a language supported by polyglossia.
\begin{english} / \textenglish{} / etc. is gonna be what you want, per
the polyglossia documentation.

When I compile your attached document, I’m getting the correct
Malayalam rendering and the Latin-script numbers for the date field
with the Rachana font. I’m using an up-to-date TeX Live 2012 on Linux
with a XeTeX binary that’s built from the most recent commit.

Peter, you say you’re using a XeTeX 0.9999.2 version? Where did you
get that from? The last point-version release I see in XeTeX’s
repository is 0.9999.1.