testing cvs HEAD - HS/SR - xlog timeline 0 pg_xlogfile_name_offset

I have two 9.0devel machines (*not* alpha but cvs as of 2010.02.19 22.48).

One primary, one slave.

In an attempt to keep track of standby progression (versus primary), I ran slave-side:

replicas=# select
pg_last_xlog_replay_location()
pg_xlogfile_name_offset(pg_last_xlog_replay_location())
, pg_last_xlog_receive_location()
, pg_xlogfile_name_offset(pg_last_xlog_receive_location())
;
pg_last_xlog_replay_location | pg_xlogfile_name_offset |
------------------------------+------------------------------------+-
E2/C012AD90 | (00000000000000E2000000C0,1224080) |

pg_last_xlog_receive_location | pg_xlogfile_name_offset
-------------------------------+-----------------------------------
E2/C012AD90 | (00000000000000E2000000C0,1224080)
(1 row)

These zero-timeline filenames look suspicious, no?
I understand timeline-count to normally start at 1, not 0?

The replication seems to be running fine (680 GB).

ps seems to report the right xlog filename (slave):

/var/data1/pg_stuff/pg_installations/pgsql.sr_hotslave/bin/postgres -D
/var/data1/pg_stuff/pg_installations/pgsql.sr_hotslave/data
\_ postgres: startup process recovering 00000001000000E2000000C0
\_ postgres: wal receiver process streaming E2/C012AE28
\_ postgres: writer process
\_ postgres: stats collector process

replicas=# select version();
version
------------------------------------------------------------------------------------------
PostgreSQL 9.0devel on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.3, 64-bit
(1 row)

Is the filename that pg_xlogfile_name_offset( pg_last_xlog_(replay|receive)_location() ) reports a
bug, or expected as shown?

thanks,

Erik Rijkers