So I just encountered this in the windows 1.2 pre 5 version:

"The fairy dragon breathes fire at you! You are washed away! Your uncursed broken short bow (+1, +1) is consumed by the heat!"

From what I recall about Fairy Dragons is that they use water bolts, but judging from the effects of this, that was an actual fire bolt. So I guess the "washed away" part was left over from when fairy dragons were less evolved.