During migration tests a lot of additional fields weren't migrated, because they had the same name. Such situation should be properly handled, i.e. newly created questions should get new unique names.
Resolved in commit 79315df7e19ebef2b790dc4bab7949990b3adbab.
I implemented this in such a way, that in case of duplicated question a postfix is appended to it (_1, _2, _3, etc.).
Verified on 16.12.2010
Bug is fixed properly.
Build Number: hudson-head-e-release-373