On the roundup.sf.net sidebar there's a link for 
"change log" which points to 

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/roundup/roundup/CHANGES.txt?rev=HEAD&content-type=text/vnd.viewcvs-markup

SF have recently tweaked their CVS setup and the 
correct link is now (I believe):

http://roundup.cvs.sourceforge.net/roundup/roundup/CHANGES.txt?view=markup&content-type=text/vnd.viewcvs-markup&revision=HEAD

Cheers,

Luke