[svn-r20408] Description:

Bring r20382:20407 from trunk to revise_chunks branch.

Tested on:
	Linux/32 2.6 (chicago) w/C++

tools/h5diff/testfiles/h5diff_102w.txt

@@ -2,9 +2,9 @@ dataset: </g1/fp1> and </g1/fp2>
 size:           [3x2]           [3x2]
 position        fp1             fp2             difference          
 ------------------------------------------------------------
-[ 0 1 ]          1e-005          2e-005          1e-005         
-[ 1 0 ]          1e-005          9e-006          9.99999e-007   
-[ 1 1 ]          0               1e-005          1e-005         
-[ 2 0 ]          1e-005          0               1e-005         
+[ 0 1 ]          1e-007          2e-007          1e-007         
+[ 1 0 ]          1e-007          3e-007          2e-007         
+[ 1 1 ]          2.2e-007        1e-007          1.2e-007       
+[ 2 0 ]          1e-007          0               1e-007         
 4 differences found
 EXIT CODE: 1