Compatibility code removed
The compatibility code for the "teamDefIDX ~> teamDefID" change reported here before was removed in r30686. Games saved before r30332 cannot be loaded with the current version.
The stable release (2.3) already saved the new format, so games created with it are not affected. The stable release can also load the old format (it has the compatibility code), so you can use it to convert your old saves to new format.
-geever