Excerpt of the release note:
http://www.unicode.org/versions/Unicode5.2.0/

The Unicode Standard, Version 5.2, adds 6,648 characters and significantly improves the documentation of conformance requirements for the specification of normalization forms, canonical ordering, and the status of types of properties. Version 5.2 brings improved clarity of presentation in many Unicode Standard Annexes.

Seven new contemporary scripts have been added in Version 5.2: Bamum, Javanese, Lisu, Meetei Mayek, Samaritan, Tai Tham, and Tai Viet. New character additions to existing scripts now provide greater support for Abkhaz, Canadian Aboriginal Syllabics, Coptic, Devanagari, Khamti Shan, Malayalam, and Myanmar. Of particular note are Devanagari additions in support of Vedic Sanskrit. Encoding Vedic is significant because Sanskrit is one of the principal languages for the religious heritage of India, and because Vedic represents the earliest attested phase of the language.

The seven contemporary scripts and newly encoded individual characters expand support of language and orthographic communities in Africa, India, China, Central Asia, Southeast Asia, and the Middle East.

Other character additions include important modern use symbols and historic characters. With Unicode Version 5.2, scholars will now have access to the Gardiner set of Egyptian Hieroglyphs as well as other important historic scripts: Imperial Aramaic, Avestan, Kaithi, Old South Arabian, and Old Turkic. Several key symbol sets were added or expanded: the ARIB set of Japanese broadcasting symbols, additional number forms used in India, and currency symbols. 


Current version is 5.1 in Python 2.6