PG/DBI: 'NOTICE: UserAbortTransactionBlock and not in in-progress state'

Hi,

I am using PG 6.5.1 and DBI. My Perl programs always print to stderr:

"NOTICE: UserAbortTransactionBlock and not in in-progress state" or
"NOTICE: EndTransactionBlock and not inprogress/abort state"

I tried to do <stmthandle> -> finish and <dbhandle> -> commit after each
query, but the messages still appear.

Any hints?

Thanks,

Markus