"`map' is truncating" message and other assorted messages

If maperror is false, map prints out the above message every time map
has arguments of different length.

Is that really necessary?  Is there any way to turn them off?

Also, I get messages like

"Warning:  Float to bigfloat conversion of 0.4535961214255773"

Are these really necessary?  Especially after we fixed it so that the
float is converted to a bfloat "exactly", with doing a rationalization
process first.

Is it possible to turn this message off too?

Ray