This may sound like a goofy point, but I usually cut and paste very common boilerplate bits like this because of my constant fat finger errors.

The two that always seem to bite me
#! /usr/bin/perl
works fine on the command line 'cause usually I am calling
perl somescript.cgi
but blows up in the browser. Drives ya nuts until you find the space between the shebang and the first /

The other one...saving files in PC format (see lots of control M) instead of unix format whilst working across platforms.

One of these days instead of spell checker I will have to work on a *goofy going to cost you fifteen minutes of hair pulling time* checker.

EEjack