Minor disaster after upgrading with cvs.

Greetings,

  I've just - about 4 hours ago upgraded via cvsup and upon restarting PG 
I was greated by this gem of information

02:10:26 postgres@berty:~ $ ./bin/pg_ctl -o -i start
postmaster successfully started
02:10:43 postgres@berty:~ $ FATAL 2:  database was initialized with 
PG_CONTROL_VERSION 0,
        but the backend was compiled with PG_CONTROL_VERSION 71.
        looks like you need to initdb.
 
02:10:50 postgres@berty:~ $  

While it is not a total disaster to have to re-create the database tables, 
it is something I did not forsee. Is there some quick and easy way out
of this er situation without having to do an anoyingly non-trivial amount 
of work?

Thanks for everything.

-- 
Sincerely etc.,

 NAME       Christopher Sawtell
 CELL PHONE 021 257 4451
 ICQ UIN    45863470
 EMAIL      csawtell @ xtra . co . nz
 CNOTES     ftp://ftp.funet.fi/pub/languages/C/tutorials/sawtell_C.tar.gz

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