restoring pgdump file file from 7.2 branch to 7.4

Hello everyone:

I am attempting to upgrade from 7.2 to 7.4 Postgresql. I have
successfully installed 7.4 and am attempting to use the pgdump from 7.2
for 7.4. I'm having only one slight error that I would like some help
with.

I create both the pgsql and pltcl languages. I get two messages that I
don't understand. The first is a warning from the pgsql with reads:

changing return type of function plpgsql_call_handler from opaque to
language_handler. Does this matter?

The other error message is could not load library
/usr/lib/pgsql/pltcl.so: /usr/lib/pgsql/pltcl.so: undefined symbol: elog

function pltcl_call_hander() does not exist.

I am sure that the pltcl.so is in the correct location. Would the
version issue of pltcl.so matter? I'm using the pltcl.so from my older
7.2 branch.

Thanks!

Bob Powell
Database Administrator