if you have a bunch of cross-validation strategies, please have a look at EXTVAL-53!
in case of objections, please send a veto to undo the change.
so far there wasn't a major change which affects custom implementations. this is the first one. we did it to stay consistent internally and because it is very easy to migrate with a simple search/replace action which is safe.
if you just used the annotations, you won't notice a change. you just notice it at custom cross-validation implementations. normally there aren't tones of it, so it isn't a big issue. nevertheless backward compatibility is basically important for us. since it's an important change for some of you, everybody is allowed to veto.
details are available the description of the issue.