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I think this is a consequence of the new Unicode support in Python 3+
Here is code copied from C:\Python32\Tools\Scripts\crlf.py (on windows)
==================================================================
 for filename in os.listdir("."):
 if os.path.isdir(filename):
 print(filename, "Directory!")
 continue
 data = open(filename, "rb").read()
 if '0円' in data:
 print(filename, "Binary!")
 continue
 newdata = data.replace("\r\n", "\n")
 if newdata != data:
 print(filename)
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When run, it produces this (run under the PyCharm debugger)
===================================================================
C:\Python32\python.exe C:/pydev/zob/zobtest.py
Traceback (most recent call last):
 File "C:/pydev/zob/zobtest.py", line 134, in <module>
 x() 
 File "C:/pydev/zob/zobtest.py", line 126, in x
 if '0円' in data:
TypeError: Type str doesn't support the buffer API
Process finished with exit code 1
===================================================================
Removing the test for "0円" produces this:
===================================================================
C:\Python32\python.exe C:/pydev/zob/zobtest.py
Traceback (most recent call last):
 File "C:/pydev/zob/zobtest.py", line 131, in <module>
 x() 
 File "C:/pydev/zob/zobtest.py", line 126, in x
 newdata = data.replace("\r\n", "\n")
TypeError: expected an object with the buffer interface
Process finished with exit code 1
===================================================================

New changeset f94d74c85dcb by Victor Stinner in branch 'default':
Close #12032: Fix scripts/crlf.py for Python 3
http://hg.python.org/cpython/rev/f94d74c85dcb 

This needs porting to 3.2.

New changeset 47ffb957921d by Éric Araujo in branch '3.2':
Update crlf and lfcr scripts for 3.x bytes semantics (#12032).
http://hg.python.org/cpython/rev/47ffb957921d