Looks like your server is running into an issue where two DO's should exist but doesnt (Probably got deleted by another removal job where it wasnt meant to. If you have the RecoverCR script you will need to run this. If not you need to start a support call with Symantec.
[2011-Oct-23 10:26:15 CEST][2781][stream0] Error: 2 : CRReplicateReceiveDO: DO download failed do fingerprint b87643875c6c9147f95364fb70a645ea
[2011-Oct-23 10:26:15 CEST][2781][stream0] Error: 2 : CRReplicate: Could not receive DO b87643875c6c9147f95364fb70a645ea to replicate: no such object
[2011-Oct-23 10:27:32 CEST][2781][stream3] Error: 2 : CRReplicateReceiveDO: DO download failed do fingerprint 369140a6569410bf36e28462d9682f94
[2011-Oct-23 10:27:32 CEST][2781][stream3] Error: 2 : CRReplicate: Could not receive DO 369140a6569410bf36e28462d9682f94 to replicate: no such object
You can confirm that they existed and were deleted by grepping through the /Storage/history/dataobjects folder for the I'ds
Also try run these commands which will no doubt confirm they are missing
/opt/pdcr/bin/dbutil -d b87643875c6c9147f95364fb70a645ea
/opt/pdcr/bin/dbutil b87643875c6c9147f95364fb70a645ea
/opt/pdcr/bin/dbutil -d 369140a6569410bf36e28462d9682f94
/opt/pdcr/bin/dbutil 369140a6569410bf36e28462d9682f94
Simon