Certain tests create BinData fields of subtype 2,3, or 4 without meeting the requirements of those fields. Bindata types 3 and 4 are UUID and must be 16 bytes long. BinData type 2 is a deprecated type which must start with a 4-byte length equal to the length of the rest of the field. The server and the shell do not check this, but the Python driver does; the C driver at least checks type 2. If invalid entries are in the database, our python test fixtures will fail if they ever see them, so these must be removed.

These invalid entries exist at least in

jstests/core/bindata_eq.js
jstests/core/in_with_mixed_values.js
jstests/core/bittest.js

The UUIDs BinData(3, "OEJTfmD8twzaj/LPKLIVkA==") in jstests/core/binData.js and BinData(4, "QlLfPHTySm6tqfuV+EOsVA==") in http://morningstar/mongodb/source/jstests/auth/kill_cursors.js are valid.