Hi,
today we discovered that there are backward compatibility
issues in the postgis datastore used in geoserver 1.4.0
compared to the one used in geoserver 1.3.2.

We traced the issue to "geometry_columns" having no schema
information, coupled with changed occurred on 2.2.x at
revision revisions 20520 and 20512 by chorner
referring to http://jira.codehaus.org/browse/GEOT-377.

Basically the datastore does not work anymore if you have
null schemas.

Now, the new AddGeometryColumn function fills in schema information,
so our dataset has been probably created by other means, or
set up by an older AddGeometryColumn.

What shall we do? At least I guess we should inform users...
Cheers
Andrea

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