This question arose before.. in this thread :-
http://www.gnutellaforums.com/showth...=&pagenumber=2
and if you are using Linux it seems identical ... a possible miss-packaging
Try going to Help or Limewire/Frostwire ?About and see if it says Frostwire or Limewire. I guess if it says Limewire, we'll have to think again.
I should point out that DRM restrictions have not yet been built into Limewire (4.10.0) and it is unclear when they will be.