Isaac,
 
Question for you on this. A client has 57 rows where BinaryBlob is 0x00 but when I restored the backup from before the 18.6 install, it has the exact same number of 0x00 blobs.
 
I cross checked the items with 0x00 to the SY20000 and SY20020 tables and none of the 0x00 blobs appear to be in those template tables (but I am assuming that TemplateID = RELID when I compared the tables).
 
** Is it safe to just delete the rows with 0x00? Whatever they are associated with, the client clearly isn't using as they are not having issues with 18.6 (and have not installed any January hotfix yet).
 
Jen