wrong assign messages in the collector logs

Hi,

Does anyone know what causes this type of errors to show up in the vCenterDC_Errors.log file for the embedded data collector?

2014-04-02T08:01:23.180-0400 ERROR [(32) HostsClustersAndVMTemplatesInventorySyncJob on VC 528] [propertyContent.PropertyContent] 7657: wrong assign : path=customValue[304], value=com.vmware.vim.CustomFieldStringValue@c6125d47 

2014-04-02T08:04:12.968-0400 ERROR [(32) HostsClustersAndVMTemplatesInventorySyncJob on VC 528] [propertyContent.PropertyContent] 7445: wrong assign : path=customValue[304], value=com.vmware.vim.CustomFieldStringValue@64b6f789 

2014-04-02T08:22:52.488-0400 ERROR [(32) HostsClustersAndVMTemplatesInventorySyncJob on VC 528] [propertyContent.PropertyContent] 6965: wrong assign : path=customValue[304], value=com.vmware.vim.CustomFieldStringValue@cae4c46a 

2014-04-02T08:27:23.475-0400 ERROR [(32) HostsClustersAndVMTemplatesInventorySyncJob on VC 528] [propertyContent.PropertyContent] 7952: wrong assign : path=customValue[304], value=com.vmware.vim.CustomFieldStringValue@d33a1a8b 

Cheers,

Milos