Hi John
There are errors in the GeoServer log indicating that the connections to PostgreSQL are failing sometimes on the test warehouse. PostgreSQL is showing a number of connections as '<IDLE> in transaction'. I have seen in the past that when there are many such connections, GeoServer is no longer able to connect.
Testwarehouse is running GeoServer 2.1.3 against PostgreSQL 8.3 with JavaRE 1.7.0_07.
Warehouse1 is running GeoServer 2.1.2 against PostgreSQL 9.1 with JavaRE 1.7.0_01
Latest release of GeoServer is 2.1.4 and PostgreSQL is 9.2
If the problem on the testwarehouse persists, an upgrade to PostgreSQL would be my first proposal, especially since you have indicated that would benefit the development of Indicia as well. Iwould also consider the test server a much better test bed if it were actually running the same versions of code as the live server.
Jim Bacon