From the DSpace software page:
"1.5.2 contains numerous bug fixes and feature improvements, including:
- SWORD module/version 1.3.1 supporting the sword standard version 1.3
- Cocoon upgraded to 2.2
- Fix for the UTF-8 issues with the XMLUI
- New authentication methods: Hierarchical LDAP and Shibboleth
- Full update translations: German, Italian for both XMLUI and JSPUI and Ukrainian for JSPUI
- New translations for 1.5.x: Greek and Thai
- Graceful resolver for urn in the item"
Source and build are both attached. For more info visit the DSpace project site.