transaction isolation level

We recently updated our postgres to 8.1.4, since then
I’ve been getting the following error:

[Aug 28, 2006 5:43:16 AM ERROR]
org.postgresql.util.PSQLException: Cannot change
transaction isolation level in the middle of a
transaction.
at
org.postgresql.jdbc2.AbstractJdbc2Connection.setTransactionIsolation(AbstractJdbc2Connection.java:729)
at com.evermind._in.setTransactionIsolation(Unknown
Source)
at com.evermind._in.setTransactionIsolation(Unknown
Source)
at com.evermind._in.setTransactionIsolation(Unknown
Source)

Here is an example of the code that does this:

Connection con = null;
try
{
DataSource ds = (DataSource)
ctx.lookup("jdbc/EncounterEJBDS");
con = ds.getConnection();

con.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
.
.
.

Anybody experienced this or have a fix?

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