For instance these 2 different URLS

http://community.jboss.org/message/619694?tstart=0
http://community.jboss.org/message/619420

are both indexed by Google, but are the same content. Site community.jboss.org needs to be more search engine aware.

It is actually much worse than just 2 URLs, if you look at http://www.google.com/search?q=%22Tomcat+and+ROOT+context+issue%22#q=%22Tomcat+and+ROOT+context+issue%22&hl=en&prmd=ivns&filter=0&bav=on.2,or.r_gc.r_pw.r_cp.&fp=79a911fe3f90cf18&biw=1280&bih=831 it seems as though each comment is indexable but yields the same content.