Data now showing up

After a few months of running, I have a database that consistantly stops
taking inserts. It isn't a high-use database, doesn't give an error, and
is really very odd. The table has one column (text) and never more than
a dozen rows.

After a while, it just stops inserting. You type an insert in psql, it
acts like it did it, you select from the data, and it's simply not there.
If I dump and rebuild the database, the problem is solved.

Any suggestions?

psql (PostgreSQL) 7.0.0

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Ken Kinder
www.kenkinder.com