Apache2::Request appears to not capture the full POST:ed value

I have encountered a problem that I have been unable to solve using
documentation/google. I'm running mod_perl 2 / (strawberry) perl
5.10.1 / Apache 2.2.20 on a Windows XP machine where I need to collect
data POSTed from a hardware (the Box) that I have no control over. The
Box is suppose to POST a semi colon separated list of data using a
field called value. I'm using Apache2::Request to parse the POST, but
it only captures the first part of the field (up until the first semi
colon).

My perl script looks like this;
sub handler {
    my $r=shift;
    my $req = Apache2::Request->new($r);
    $input = $req->param('value');
    warn "INPUT is $input";
    return Apache2::Const::OK;
}

And this is what I see in my logs;
[Sun Oct 09 22:08:20 2011] [notice] mod_dumpio:  dumpio_in
(data-HEAP): value=f1;2011-10-09;21:25:40;14;0;;0;0;3;1
[....]
INPUT is f1 at [...]

My thoughts on the problem is that it relates to URL encoding, as when
I send a direct query to the script it only fetches the whole part
when I encode the semi-colons. I have however not found a way to e.g.
mod_rewrite the POST content.
Any thoughts that could aid me?
THanks