OK. Just to give this topic a bump becasue I think it's important.
I removed the .DS_Store files and this seemed to resolve the problem albeit momentarily: half way through my next import the issue recurred. It seems this issue may be related to the horrible problems users of Western Digital drives are experiencing with Mavericks.
My advice for people using Premiere Pro and Audition is DO NOT UPGRADE TO MAVERICKS at least until Apple find the root of this problem.
I bought and installed a new LaCie drive on Thursday and have the same problem with that so can assume that it's not an issue with the drive.
I installed the latest Premiere Pro CC update this morning but the problem persists.
I hope this thread might save somebody else from the grief I've had since upgrading to Mavericks.
After two weeks of pain I have decided to uninstall the operating system and go back to Mountain Lion. The more I looked into it the more issues I had... I started by losing functionality when I tried to import... then my drives started to unmount. I would have to reset the P RAM - once a week to begin with but then with increasing frequency. Originally I could drag and drop media into bins but even that route failed... finally my Autosave back-ups disappeared from Premiere - it seems the whole App became corrupted.
I also discovered today that apparently Apple changed the Quicktime codecs in this new OS.
Adobe advised me to get rid of Mavericks and that is what I'm about to do...
I've just erased my drive and reinstalled Mountain Lion. After a few tense hours rebuilding my project everything seems to be working so the issue was Mavericks after all..
I have the same problem. I am working on a very large editing project using Premiere Pro CC on an iMac with Mavericks.
When I try to import new video, the import window goes away and then all of the drop down menus are grayed out. All I can do is quit and reopen the file.
I am able to drag and drop files into my project window. But I would rather do this from the menu.
Apple have no reason to make things look good for Adobe and have a long history of OS upgrades making life dificult even for their own fan base.