Internet Explorer ( ie8, ie9 ) is mangling downloads from this blog.

Links to files on this blog ( eg., dirstats ) are typically downloaded using browser:
  R-click, SaveAs

This works fine on Chrome, Firefox and Safari.  Internet Explorer is not handling the html reference to the file, and adds .html to the filename.   The file will be saved in an incorrect format.   Relatively harmless for a script file that is plain text, but binary files like obiaix.tar.gz , will be corrupted, and there is nothing you can do about it.

"Don't get corrupted, get rid of cable  Internet Explorer, use firefox"  ( sorry, US TV advert reference )

The useful part of the compressed tar file is that you don't have to worry about Windows line-end characters corrupting the scripts, and you don't have to change execution permissions to get the scripts to work.
 dos2unix dirstats 
 chmod +x dirstats