There have been lots of reported problems with people using Notty lately. I've switched to us-05 and have been getting very good results.
Primary 1: 4 Hop IPA
Primary 2: Apfelwein
Primary 3: Air
Bottled: Hammered Squirrel Nut Brown Ale (btl. 5/9/10), Jamil's Evil Twin (btl. 3/29/10), Crazy Ivan RIS (btl. 2/14/10), English Pale Ale (btl. 12/29/09), Apfelwein