(observed in nightly oracle and hsql instances)
I created an assessment with all survey questions, one of each type, exported it from mysql, and then imported it to both oracle and hsqldb. (exported xml is attached.)
The good news is that no text at all got lost. However, some fields got added. A Rationale text box got added to every question in delivery, even though survey questions don't have a rationale option. And a blank selection-level feedback field got added for every answer choice.
I guess this isn't really a major bug, since the extra rationale field adds functionality rather than takes it away. But it will still make survey-givers unhappy.