We haven't been able to narrow down the exact test case, but here's what is happening:

We have an INSERT - SQL statement where a field/value list is specified. There are a couple of fields that aren't in the field list of the command that are being populated with values from the previous record even though the fields themselves have a zero as their default value.

Example:

INSERT INTO MyTable (f1, f2, f3) VALUES (1, 2, 3)

Fields f4 and f5 are being populated with values from MyTable's prior record instead of defaulting to zero.

Does anyone know of any circumstances that could make this happen?