Changes (in chronological order) Files Description ----- ----------- website/cgi-bin/ meme_request.pl Fixed a bug where the absence of the bgsrc parameter was causing problems when it was supposed to be optional. This is because I expected Perl to return undef from CGI::param() when the parameter doesn't exist but apparently this depends on the context and in array context it returns an empty array instead. Installing the patch: 1) Change into the root meme_4.6.1 distribution directory 2) Apply the patch by running: patch -p0 -i PATH_TO_PATCH/meme_4.6.1.patch_2 3) If you have previously installed then optionally change into the website/cgi-bin subdirectory (it's slightly faster this way) 4) Make the install files: make 5) Install by running: make install If run on split server this is only needed on the web-server side.