pgadmin iii ...... pg 7.3.4

I'm getting "error connecting to server FATAL password authentication failed
for user postgres"  using pgadmin 3.  It worked fine in 7.3.3 but now i
can't connect in 7.3.4. Any ideas?  I'm getting:  it says  unsupported
frontend protocol  in the postgres log.  Thanks

Best Regards,

John Bercik

Systems Programmer            Phone:  843-792-1715
Department of Medicine            Fax:    843-792-0816

Medical University of South Carolina    email:  bercikj@musc.edu
Room 826F,  Clinical Science Building
96 Jonathan Lucas Street
Charleston, SC 29425