From the Coheed and Cambria website:
AFI cancels rest of tour
05 Mar 2004 by Admin
Hey everyone, we're very sorry to hear that Davey Havoc developed a cyst on his vocal chords, and that AFI has to cancel the rest of this tour.
Our hearts are with him and wish him a speedy recovery.
We will Honor 2 shows with Thursday now headlining.
March 6 (Sat) - Ft Lauderdale - Culture Room
March 9 (tues) - Orlando - House of Blues
We will do the dates around SXSW in Austin, March 19 and 20. All other March dates have been cancelled, including Oklahoma City.
We're very sorry to our fans who have purchased tickets to any of the cancelled shows, we will give refund information ASAP.
Wow. I just saw them last week. All my love and best wishes to Davey right now.