Description of problem:
diff -b and diff -w report differences on lines with only blanks on 64-bit processor

Version-Release number of selected component (if applicable):
diff 2.8.1
gcc (GCC) 4.1.2 20070925 (Red Hat 4.1.2-33)

How reproducible:
100%

Steps to Reproduce:
1. echo "     " > blanks
2. echo "" > empty
3. diff -b
4. diff -w
  
Actual results:
differences

Expected results:
no differences

Additional info:
Presumably a bug in gcc, actually :)
I recompiled diffutils 2.8.1 with the above gcc and that is better, but it still
shows differences for diff -t
NOTE - this is 2.6.23.1-42.fc8 on a 64-bit Q6700
see attachment