Exceptions in "tika_1_6" but not in "tika_1_8_SNAPSHOT"

FILE_EXTENSION	COUNT
ppt	200
xls	95
pdf	36
doc	3
pps	2
txt	1

SELECT File_Extension, count(1) as COUNT from comparisons where SORT_STACK_TRACE_A <> '' and SORT_STACK_TRACE_B is null and JSON_EX_A is null and JSON_EX_B is null group by FILE_EXTENSION order by COUNT desc