Hi,
if you've been affected by serious slowdowns while zooming
in on your WMS maps in GeoServer 1.7.5 you might be interested
in this patch:
http://blog.geoserver.org/2009/07/03/geoserver-175-critical-wms-patch/
Cheers
Andrea
--
Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.