"Improved support for Mathematica files"

In the release notes, I read that DT 2 has improved support for .nb files. It seemed to work very well before, so I am wondering: what are the differences?

Thanks.

Only the handling of the filenames (after renaming or while exporting) has been improved.

Wow, that used to irritate me no end, to the point where I avoid putting mathematica notebooks in DT! Thank you!!