What pitfalls should I be aware of when upgrading our servers and clients from 5x to 6?
Subject: Upgrading from 5x to 6
Take a look at this redbook:
http://publib-b.boulder.ibm.com/Redbooks.nsf/RedbookAbstracts/sg246889.html?Open
Should cover all of your questions.
These redbooks are a vast library of great information and knowledge.