Hmm, binmode should not be needed on Linux (or Unix.) From perldoc -f binmode: 

   Arranges for FILEHANDLE to be read or written in "binary" 
   or "text" mode on systems where the run-time libraries
   distinguish between binary and text files..

[download]
But the libraries on Unix-like systems make no such distinction. I'm guessing that the measures you took worked around the bug I mentioned below.

"Even if you are on the right track, you'll get run over if you just sit there." - Will Rogers

In reply to Re^3: Help with RC4 by hbo
in thread Help with RC4 by jmamer

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