Bit of a gremlin in the description of round, it says the same as
truncate.

	* scheme-data.texi (Arithmetic): round is to nearest even.

This would be for the 1.6 branch too I think, since it's contrary to
the r5rs and the code.

 - Scheme Procedure: round x
     Round the inexact number X to the nearest integer.  When exactly
     halfway between two integers, round to the even one.