The patch for the icon has changed, patch included. This should also be relevant to the 13.0 ebuild. Reproducible: Always
Created attachment 376390 [details, diff] Proposed patch
should be all set now in the tree; thanks for the report! Commit message: Update path to desktop icon http://sources.gentoo.org/media-tv/xbmc/xbmc-9999.ebuild?r1=1.153&r2=1.154