Opening Solution Creates Extraneous Xx.database Files In SSIS Project

I have a solution with a couple of ssis projects in it.  Everytime I open the solution, Visual Studio creates an extra .database file for the project's existing xxx.database file.  The solution is under VSS control and VS2005 checks out the project and shows the file as a newly added file.

What causes this and how can I prevent this from occurring?

The files contain this:

<Database xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dwd="http://schemas.microsoft.com/DataWarehouse/Designer/1.0" dwd:design-time-name="d3ce9653-3ac5-4ee5-85c3-7d60b2e5f109" xmlns="http://schemas.microsoft.com/analysisservices/2003/engine">
  <ID>Publish</ID>
  <Name>Publish</Name>
  <CreatedTimestamp>0001-01-01T00:00:00Z</CreatedTimestamp>
  <LastSchemaUpdate>0001-01-01T00:00:00Z</LastSchemaUpdate>
  <LastProcessed>0001-01-01T00:00:00Z</LastProcessed>
  <State>Unprocessed</State>
  <LastUpdate>0001-01-01T00:00:00Z</LastUpdate>
  <DataSourceImpersonationInfo>
    <ImpersonationMode>Default</ImpersonationMode>
    <ImpersonationInfoSecurity>Unchanged</ImpersonationInfoSecurity>
  </DataSourceImpersonationInfo>
</Database>
 

There are 2 of us working on the solution and the other fellow does not see this behavior.

The files do not show up in the VS2005 solution explorer.  If they are user specific as I suspect (impersonation info?), then they should not be added to the .dtproj project file.

Thanks!