Jon:

Since Vfp 5 and I asume it,s the same with vfp 7, after heavy mathematical operations, round doesn´t return always the same for the same parameter. I can´t remember the examples. Three or four years ago I transformed every round() in ours programs to round1()
I didn´t have any problems since that

PROCEDURE ROUND1

LPARAMETER A,B
RETURN VAL(STR(m.A,18,m.B))