<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">If it smells bad, throw it out. </div></BLOCKQUOTE>
That's okay-as far as it goes. Though smell can inform you of the presence of spoilage organisms (and is usesful in this regard, especially for items that will not be cooked), vacuum-packed meats frequently have an odor when removed from the package due to the lack of oxygen. This odor should dissipate on its own (rinsing briefly in cold water can speed dissipation) as the meat is exposed to air for a bit.
As I've noted many times, malodor can indicate the presence of spoilage organisms but spoilage organisms rarely cause illness--they cause quality problems of off-odors and poor taste. Pathogenic and toxigenic bacteria--those responsible for food-borne illnesses (like E. coli, Salmonella, Listeria, et al.)--cannot be detected by smell no matter what their concentration.