This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
1-The validation framework is only available in version 1.1 2-Having different modules in the same application is only available in 1.1 3-There are differences in how you set up the web.xml file and struts-config.xml file.
If at all possible, I'd recommend you use version 1.1 or above.