Upgrade to Q3.3.1 notes -
By Steve Tunstall on Jun 08, 2011
Ok, so there is a good reason why you folks want to upgrade. These upgrades fix some great bugs that other clients may have found, and you just have been lucky not to have had effect you yet. Another reason is that at some point when you DO want to upgrade, you may be too far behind to upgrade directly to the newest version. Check out this screenshot. In trying to upgrade to Q3.3.1, the update informs me that I won't be able to do this until I upgrade to Q3.2.0.
Just something to be aware of, so you can plan for additional time if you need to upgrade twice during your maintenance window.