This one probably falls much more into the area of "FUD" (Fear, Uncertainty and Doubt) than most of my posts. Please take it with a huge grain of salt, because my information is extremely limited, at least at this time.
Tonight, I monitored some group chat in the Firestorm Support Group, the in-world support group for the popular third party Second Life viewer software, Firestorm. One resident stated that a friend had visited a site, or downloaded a viewer (I'm not sure which) called "Firestorm Excellence". Following this, the friend was having serious problems with SL.
A Google search (by myself, and another by another group member) failed to turn up any reference to "Firestorm Excellence". It is certainly nothing that is put out by or associated with the Firestorm viewer team.
So...maybe it is all a misunderstanding. But, if someone gives you a link to the latest Firestorm viewer, check it! The official page is: http://www.firestormviewer.org/