Why would a LS agent issuing a GetDocumentbyURL to retrieve a database document from the same server on which it is running succeed on one server and fail with “WEB(2): Request contained invalid syntax; verify the URL you specified” error on another. Both servers are configured similarly (it is tempting to say “identically,” but one is never quite sure…), well, the one which refuses serving DB docs is a Release 6.0.2CF1, the other one is a Release 6.0.1.
The agent succeeds retrieving plain HTML documents, but fails retrieving DB docs.