2000 - 2005 DTS Incompatibility

We have encountered a strange problem when both 2000 and 2005 client tools are installed on the same system.  If a user has both toolsets installed and they make a change to an existing DTS Package (stored on a 2K box and using only Enterprise Manager 2000 to make the change), the package will fail to run on its normal schedule giving the following error:

Error:  -2147467259 (80004005); Provider Error:  0 (0) Error string:  Unspecified error Error source:  Microsoft Data Transformation Services (DTS) Package Help file:  sqldts80.hlp Help context:  713

Furthermore, any other machine that does not have 2005 client tools installed will no longer be able to open or edit the package.  This seems to indicate that during the install of 2005 client tools, a shared file or dll is updated which, when used to edit the packages, makes them break when trying to run them on a purely 2000 box with no 2005 components.

The only current workaround is to only change the DTS package using a workstation that does not have any 2005 components installed.  Since we have some 2000 and 2005 servers, we really need to have both sets of client tools installed on our workstations.

Does anyone have any information that might help with this issue?

Thanks