[postgis-users] ST_Buffer

[dave at inventium.co.uk]

I am completely new to PostGIS and I appear to be falling at the first
hurdle. 
Trying the example in the documentation
(http://postgis.refractions.net/documentation/manual-1.5/ST_Buffer.html):  
SELECT ST_Buffer(ST_GeomFromText('POINT(100 90)'), 50); 
works fine while:
SELECT ST_Buffer(ST_GeomFromText('POINT(100 90)'), 50, 'quad_segs=4');
Gives a syntax error and
SELECT ST_Buffer(ST_GeomFromText('POINT(100 90)'), 50, 4);
crashes the server.
What am I doing wrong?
Versions:
PostgreSQL 8.4.5 on Windows 7
POstGIS 1.5.2
Thanks Dave






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