in reply to The Case of the Missing .pm which isn't supposed to be there...

You can track down the location of the eval by setting up a die handler that prints a stack trace. For example:
$SIG{__DIE__} = sub { my @stack; my $i = 0; while(my($package, $file, $line) = caller($i++)) { push @stack, " package $package, file $file, line $line\n"; } die @_, @stack; };
Note that I have not tested this with FastCGI.

First, though, you should do a quick grep of the source for the word 'simple'. That's easier and should work fine in this case.