Last I heard, which was more than a month ago, there was an issue with the backup and restore process - which implies there is an issue with importing. The changes made to the database necessitated a whole new approach to the structure of the backup file, which meant a new approach to the restoration process and so, in turn, the importation of courses has also changed. It tumbles, or cascades when you make the kinds of changes to a program that have been made. I understood the recommendations were that testing and training should occur for this version and the old and the new should be run in parallel until the restoration process is refined enough to adapt courses from earlier Moodles.
Please understand that the new version is a huge step up, not like the change to UTF-8, that was minor in comparison. This is more like a flat dbase to Oracle change, without all the bits in between - its huge. There was always going to be some fallout, but the end result is going to be worth it.
All I am doing is to revamp my courses, about 30 of them, which are not too many into the Moodle 2.0 format simply by rewriting them. But I can do this, I have some time and a lot of what I am doing is on my own private server. All I am doing is to copy and paste text, uploading images from the old Moodledata folder as a zip file and unzipping them then linking them to the text. It has been a bit awkward getting things to work, and there have been some annoyances, but once you get used to it, the new is not too bad at all.
A lot of the functionality seems different, but it is not really. The interface was a bit WAILAHED, (what am I looking at here - expletives deleted) but once you get used to it, it is going to be OK. In the meantime, a lot of people are going bunta because it is "different", "ugly" or "useless" but really, when all said and done, it is necessary change, to suit the newer paradigms.
If what I have heard recently about Android, it may be ported to a desktop, then these changes could not have happened at a more beneficial time. Moodle 2.0 will be a lot more easily adaptable than v1.9.x. Swings and roundabouts....