Add newly created PostGIS layer, bad SRS behavior

In this order

• Add a shape file to postgis (shp2pgsql)
• Start uDig
• Add layer to uDig (no problem!)
• Make a new table (create table newlayer as select * from oldlayer)
• Add geometry_columns metadata for that layer
• Try to add PostGIS layer
• Layer is found, and can be added
• BUT, it won't render because it claims the SRS is unknown
• even though the SRS is in geometry_columns and set on the geometyr

It looks like some aspects of geometry_columns are being cached and not re-read, so the information uDig is working with is out-of-date.