transaction aborted with error

 Hello. I have a problem with Postgresql 7.1 beta (Debian packages).

 When I am in middle of transaction and there is an error, for example
 caused by trying to insert a tupla with a "not null" value without valor, I
 get error:

     NOTICE: current transaction is aborted, queries ignored until end of
    transaction block.

 I don't like this behaviour, is there any form of avoiding abortion of
 transaction on error?...

 Thanks.

                                                             David