ERROR: row is too big: size 8176, maximum size 8160

Hello,

I am using postgresql-8.3.7 and have recently got this error:

org.postgresql.util.PSQLException: ERROR: row is too big: size 8168,
maximum size 8160

How is that possible in version 8+?

I`ve found some old version 7 manuals that suggest editing
/src/include/config.h file but I did not find one for my sources.

How could I overcome this problem? Do I need to recompile the database?
Do I need to recreate the database already present?

Thank you.
SDA