I just recently had a hairy issue where someone, in their CGI script, had a

chop; chop; 
$_ = "$_\n";
[download]

which made file uploads from browsers in Windows DTRT, but totally broke my UNIX file-upload thingy. Part of the solution involved changing those three lines to read:

chomp; chomp;
$_ = "$_\n";
[download]

You might try that here.