I just tried to replicate this and I think there is a bug introduced in the past day or two in the PieFed code. Since piefed.zip is running the development version of the code (as opposed to stable), these kinds of bugs are going to happen from time to time. I will try to work on a fix today.

Edit: the fix was pretty easy. I just pushed an update to the code to fix this, so it will start working again whenever piefed.zip updates (I think they automatically update once per day).