invalid byte sequence for encoding "UTF8": 0x00

Hi,

I've got another problem. I sometimes get the following SQLException
when doing an insert:

ERROR: invalid byte sequence for encoding "UTF8": 0x00
Exception: org.postgresql.util.PSQLException
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1525)
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1309)
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:308)

By the way, the insert is done with a PreparedStatement and I use only
setLong(), setString(), setTimestamp() and setInt().

I don't understand it very well. It is obviously an encoding exception
but I don't know why it happens and what I could do avoid it.

Any idea?

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