I am using SR11. I tried importing and didn't find any difference in UI. Also I tried to replicate the same in a sample qvw by pivoting, conditional display, minimize and maximize option. But all were unsuccessful.I will try to see whether I can post a sample qvw.
BLOB is usually an abbreviation of Binary Large OBject. In this context it is maybe a compressed or binary representation that QlikView does not see necessary to make into a readable value in the XML. QlikView will be able to read it back into some sensible information.