There are a number of errors in the documentation at:
Under the ubuntu/debian section:
The list ordering is reset for the maven installation instructions.
Under the redhat/centos section:
The list ordering is reset for the java installation instructions.
The instructions say to install maven 3.0.3 when it should be maven 2.2.1 (at least I think, but I really don't know...ubuntu instructions indicate maven2). Also the example shows maven 3.0.4 being installed not 3.0.3.
"Uncommend" instead of "uncomment" is used in a few places.