Somebody on the flist I think it was Fernwithy or Moey? Wondered about the use of 'fug' on the windows.
ArthurALevine has a FAQ, where they have some book corrections, in it they say that fug is correct, that the word is used correctly. Although if indeed it means as 'foggy' as fug seems to be it's a bit weird.
They also mention that 'site' is a mistake like we all thought and a few other things.