Altered behaviour of grep

[Fergus Daly]

grep -Pl "\xmn"
used to find files containing the ASCII character mn. For instance
grep -PL "\x0d" or "\x0a" or usefully "\x00".
This seems to have been lost with the current version.
Is this an error? If not, can anybody tell me what new syntax will recover the old behaviour?
Thank you.
Fergus 

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple