Users are directed to input a line such as "replacer -i *.html" to tell the program what base of files to start with. However, when I use getopts() to grab the *.html, it only gives me the first item.

This is because your shell interpolates. Try this one to see what happens:

perl -MData::Dumper -e'print Dumper(\@ARGV)' *
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It is not done by Perl (might be on non-unices, I don't know about that), as you can see when you use echo(1):

echo *
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