Report of multiple character render issues in the Android 4.1.1 on Firefox Mobile Beta (16.0). These following Unicode character have issues. U+17C4, U+17C5, U+17CF, U+17D0 Screenshot from the device attached.
This should be fixed in v17, thanks to the harfbuzz updates we've taken in bug 780409 and since.
Thanks jfkthame. Danh mentioned that there are issues with khmer subscript are rendered as '+' as well. Are these fixed in the next harfbuzz update http://www.microsoft.com/typography/otspec/features_ae.htm#blwf
Danh, Can you test the latest nightly (nightly.mozilla.org) and see if these issues are fixed.
Thanks Danh, Closing this bug based on Danh offline feedback.