Unable to start Postgres DB

Hi,

I have the following problem with postgres while starting:

LOG: loaded library "$libdir/plugins/plugin_debugger"
LOG: could not create IPv6 socket: Address family not supported by protocol
LOG: database system was interrupted while in recovery at 2009-09-02 14:13:49 IST
HINT: This probably means that some data is corrupted and you will have to use the last backup for recovery.
LOG: database system was not properly shut down; automatic recovery in progress
LOG: redo starts at 1154/1601E0A0
FATAL: could not create relation 582578/582570/2798264: File exists
CONTEXT: xlog redo insert: rel 582578/582570/2798264; tid 418/24
LOG: startup process (PID 6939) exited with exit code 1
LOG: aborting startup due to startup process failure

We don't have any backup's.......is there any other way to clear the problem and up the postgres database.

We are using Postgres 8.3 version.

Thanks,
Venkat