It's not just Air that Adobe seem to think doesn't need any pre-release testing. From https://bugbase.adobe.com/index.cfm?event=bug&id=3321659
"IE9 cannot display Flash-enabled web sites (EG adobe.com, yahoo.com) under NON-Administrator user profiles, after 11.4.402.265 update."
Testing / Quality control!
Perhaps Adobe should familiarise themselves with at least one of these new radical software development processes.