Migrating PostgreSQL databases after upgrading from 8.3 to 8.4

Question

PostgreSQL

Updated here just now Debian and with it updated PostgreSQL from version 8.3 to version 8.4.
Of course, 8.4 is too cool to use bases from 8.3 and it was delivered clean. I didn't think about pgdump then. And now it's too late. I don't want to downgrade to 8.3. Are there more reasonable solutions?

upd: I checked the backups. They are not here. They forgot about the database for 3 weeks, and the backup script deletes everything older than 10 days.

Answer 1

By the virtual computer to put 8.3, to raise bases. Make a dump. On 8.4 restaurant.
Raise a virtual machine even on a home / work computer.