I was trying to figure out why my false-positive spam messages were being tagged as "personal" by thunderbird, and I noticed a possible problem. According to DJB: http://cr.yp.to/proto/maildir.html
> New flags may be defined later. Flags must be stored in ASCII order: e.g., > "2,FRS". Looking at my maildir, I am seeing flags out of order, such as "2,Sdae" Shouldn't that be "2,Sade"? -Aaron
