File path error on Windows

[crossoft]

See this error - it appears to be failing because of a trailing space on the name of the presentation.

infoq_downloader http://www.infoq.com/presentations/fault-tolerance-101-qcon-london
Downloading HTML file
Traceback (most recent call last):
File "", line 61, in
File "F:\tayseer\projects\infoq-downloader-player\build\infoq_downloader\out00
-PYZ.pyz\os", line 157, in makedirs
WindowsError: [Error 3] The system cannot find the path specified: 'downloads\Fault Tolerance 101 /slides'