FDA Alert: Some Advair Discus inhalers stolen from a distribution warehouse in 2009 have shown up in pharmacies. Lot numbers available at the link —- don’t use these particular lots. They may have been tampered with, have lost potency, been handled improperly.

Note this is not a problem with Advair in general, just that certain inhalers may have been tampered with.  Just avoid the lots in question. :)