I figured it out. You guys were right. :o) I did have an eval in there. I had it do a search for variables and switch them out of the HTML:

$_template_code =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ eval($1) /ge; # Switch a
+ll the $variables... (This is the WHOLE html document, $_page_content
+ is in the main table for the main content. This will switch any vari
+ables with the data.
[download]

I fixed it by adding this to it:

$_template_code =~ s/(\$[a-zA-Z0-9\{\'\}_]+)/ eval($1) /ge if $1; # Sw
+itch all the $variables...
[download]

adding the 'if $1' fixed it because the variable is undefined so it won't switch it.

Thank you guys for pointing me in the write direction :)