Looking into the documentation of the unicode database i found that there are some numeric characters that are not listed in the UnicodeData.txt file. They are intead listen in the Unihan.txt file. (See http://www.unicode.org/Public/5.0.0/ucd/UCD.html#Numeric_Type_Han). I have a patch for this in the works.
Is there anything in this issue that is not addressed by #1571184? It looks like this was originally reported on SF where bug reports and patches had separate ids, so this is probably a duplicate of #1571184.