Here's a nasty one, guys.

Have a form that, when submitted, creates a prompt as to whether to save or run the target .cgi script.

Extensions are correct, the browser has Perl, script saved in Linux/unix format with proper line endings, permissions on target .cgi are correct... all the usual causes of abject squirreliness have been checked...

This is part of a HUGE perl/cgi application that has worked for over a decade. Seriously. This is just NOW showing up. Other forms IN THE SAME .pl file work correctly. Method is set to "post," nothing hinky in the form declaration. Path is to the same directory in the form "action='./myscript.cgi'>"

Any ideas?