For Version 7.5.1, Rational Data Architect has been renamed to InfoSphere Data Architect. Customers who have Rational Data Architect Version 7.5 can upgrade to InfoSphere Data Architect using Installation Manager.
For a list of APARs that were fixed in this release, see: http://www.ibm.com/support/docview.wss?rs=3045&uid=swg27014021