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Description of problem:
file with 4 lines of content:
T.0402A.P
T.0402A.Z
T.0402.P
T.0402A.A 

run "cat testfile | sort" results:
T.0402A.A
T.0402A.P
T.0402A.Z
T.0402.P

The last line "T.0402.P" should be first.
Also tried this with "sort -d" which gives same results.
Test on RHAS3 with "coreutils" gives correct output.

Version-Release number of selected component (if applicable):
textutils

How reproducible:
Always

Steps to Reproduce:
create a file with the contents:
T.0402A.P
T.0402A.Z
T.0402.P
T.0402A.A
run "sort <filename>" or "sort -d <filename>"
incorrect output results.

Try the same steps on an RHAS3 box with coreutils and it works as expected and documented.

Actual Results:  Incorrect output was given.

Expected Results:  The last line of output should have been the first line (according to the sort documentation).  It works fine on RHAS3, but not on RHAS2.1

Additional info:

This is a problem when we have systems with scripts that we are migrating from HP or SUN systems, or when we try to upgrade from broken systems (RH7.2 and RHAS2.1) to a non-broken system and the results are inconsistent.

We have billing and accounting systems that are being affected!