I am surprised no one answered this. I know in most animals the quality of their stool is one important way to gauge how healthy they are, but I have no idea what the range of normal is for a BP.
Surely someone on BP.net knows if misterman should be rushing his BP to the vet or if this is perfectly normal or ... ?
I just experienced this with my snake. I took the feces to the vet and it came back clean. They said they didn't know why this would happen just keep and eye on it. And he has been fine since. But I would definitley get him checked out.