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Looking at the latest build: http://bits.netbeans.org/download/trunk/nightly/2009-10-23_02-01-27/ I see there is a link to the beta release at the top: http://download.netbeans.org/netbeans/download/6.8/beta But this link is incorrect, it should be: http://download.netbeans.org/netbeans/6.8/beta/
sorry, should be fixed in the next build. http://hg.netbeans.org/main/rev/772e2a03ecab