function accepting a row

Hi,
I'am trying to create a function in plpgsql that will accept a parameter
of type rowtype. Here is a little test script I wrote:
http://62.121.81.182/pub/test_func.sql

It works on Postgres 8.03, but fails on 7.4, where I actually want it to
work. What am I doing wrong? Error message says that there is no such
column "row", but it doesn't help me much understanding the problem.

Thanks for help,
Tomek Grzejszczyk