Here are a couple of succinct methods:

my $ta = param('textbox');
$ta =~ s/\r?\n//g;
print $ta;

# or if you really want an array:
my @v = split /\r?\n/, param('textbox');
[download]

I'm not 100% sure whether *all* browsers will send the \r, hence the ? in the regex.

.02

cLive ;-)