I think the problem may be with your naming scheme. As opposed to naming the select box something like "input", try naming it:
input[];
For the full example:
<form>
<select NAME="input[]" SIZE=3 MULTIPLE>
<option VALUE="opt1">option1
<option VALUE="opt2">option2
<option SELECTED VALUE="opt3">option3
</select>
</form>
And then when it gets to your Perl script, you can treat it as an array. Otherwise, your Perl script really does only see it as one value.
-Eric
UPDATE Okay, maybe it's time to kick myself for having a PHP background before I came around to the Perl world :-)
However, what would the proper method be in this scenerio -- If I used HTML::Template to build my template, and CGI.pm to process them.. in that case, what would be the proper thing to name the SELECT element?
a.
<select name="myname" multiple>
b.
<select name="myname[]" multiple>
Thanks! :-)