A number of people updating to SL Viewer 3.2.8 are getting pink prims. See the image below.

There are two fixes. Neither are that great, but they will get you by until the Lab brings out a fix. The fix is thanks to the Firestorm/Phoenix Team, as far as I can tell. See: FIRE-4945 – Pink/Fushia textures when basic shaders enabled on ATI 3000-4000-5000 series cards.