When working with a Base document connected to a spreadsheet and a related
Writer document pulling data from that data source, I got a blank warning dialog
and a blank table when trying to access the tables.

To reproduce:

-download attached MiddleEarth.ods file
-In OpenOffice.org, go to the New menu and choose Database
-In the dialog that appears, select "connect to an existing database" and set
the source type to "Spreadsheet."
-Click "Next"
-"Click Browse", navigate to the Middle Earth.ods file, click "Open"
-Click "Next"
-Make sure that "Yes, register the database for me" is checked
-Click Finish
-Give new database file a name and save
-New Base document will open
-click on "tables" then double click on "GoodGuys" to see contents of table
-Close the database file
-Create a new Writer document
-Click on the Data Sources icon on the toolbar
-In the Data Sources Viewer, navigate to the MiddleEarth database, and choose
the GoodGuys Table (you may need to click on disclosure triangles to drill down
to it)
-Drag the fields to the Writer document
-Select one or more rolse of data in the Data Source Viewer and click on the
Data to Fields button 
-Save document
-Open MiddleEarth.ods file (the spreadsheet) It will open as read only
-Close MiddleEarth.ods
-Open the odb (Base) File
-Click on Tables, then double click on "BadGuys" The blank warning will appear
-BadGuys table will open, but will be empty 

Only if you quit and restart OpenOffice.org will things reset and the tables be
available correctly.
This only happens when a Writer document which uses the odb files as a
datasource if part of the mix.