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Drop in at the X Forums and tell us what you think about X.
All the best!
Mike Foster
11 Feb 2010
Release history for X is maintained in xlibrary.xml. View it online. The release notes for X 4.21 follow.
X Tools now has Ant build files which automate the use of XAG, XPP and YUICompressor. Now you don't have to worry about learning to use XAG and XPP, just take a look at the 'build.xml' file for examples.