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+Welcome to Jython 2.1
+=======================
+
+Important: The format of both compiled ($py.class) and frozen module
+has changed from version 2.0. It is necesary to delete existing
+$py.class files and recompile frozen applications when upgrading
+to Jython-2.1.
+
+Other backward incompatible changes include:
+
+- The case of module names are now important, even on case ignoring
+ filesystems like windows. This matches CPython behaviour.
+
+- The way .zip and .jar files is added to sys.path is changed from 2.1a3.
+ Use the form: sys.path.append("/path/to/file.zip/Lib") to search for
+ modules with the zipped named of "Lib/module.py"
+