>> I confirm "Invalid Blob ID" error for FB 2.1.3 while current FB 2.5 RC1 is OK.
>> After applying patch from CORE-2602 to the FB 2.1.3 it is also OK.
>> Looking in depth i suspect we still have the issue but it is hidden
>> because of the patch. More details later.
>
> Thanks Vlad!

A little workaround : the error happens on second and all subsequent execution
of query to the monitoring tables in the same transaction. First run is OK.

Not sure it will help you...

Regards,
Vlad