hey all - the MyghtyUtils package, version 0.52 on cheeseshop, has this general file structure: MyghtyUtils-0.52/setup.py MyghtyUtils-0.52/ez_setup.py MyghtyUtils-0.52/lib/myghtyutils/__init__.py MyghtyUtils-0.52/lib/myghtyutils/memcached.py MyghtyUtils-0.52/lib/myghtyutils/<other .py files> MyghtyUtils-0.52/test/Container.py MyghtyUtils-0.52/test/LRUCache.py MyghtyUtils-0.52/test/SyncDict.py MyghtyUtils-0.52/test/testbase.py however, when you run "python setup.py sdist" on an OS X machine (interestingly, *not* on a windows machine), the resulting tar/gz file contains an extra file: MyghtyUtils-0.52/test/._Container.py no idea why that is...but this creates problems on windows. Then, when you go to install this package on a windows machine (*not* on an OS X or other unixy machine), you get this error: File "c:\python24\lib\site-packages\setuptools-0.6c1-py2.4.egg\setuptools \archive_util.py", line 192, in unpack_tarfile tarobj._extract_member(member,dst) # XXX Ugh File "C:\Python24\lib\tarfile.py", line 1440, in _extract_member self.utime(tarinfo, targetpath) File "C:\Python24\lib\tarfile.py", line 1572, in utime raise ExtractError, "could not change modification time" tarfile.ExtractError: could not change modification time when I go into tarfile.py line 1572 and modify the exception to also print out the underying error, you get this: IOError: [Errno 13] Permission Denied: 'MyghtyUtils-0.52\\test\ \._Container.py' So the extra "._Container.py" file is the source of the windows issue. If you want to reproduce, simply check out the latest source of MyghtyUtils from http://svn.myghty.org/myghtyutils/trunk and run "setup.py sdist". I havent seen this happen with my other packages. I have solved the problem by just running the sdist on the windows machine. but this is pretty strange. any ideas ?