I was having some issues overtime I tried to import it would say it could not read file, so I uninstalled LR re installed it and it's the updated version now... now it won't even open up the files. I'm about to just delete LR and find something else! help! I have been at this for days now...
In the import dialog click on the destination folder and select the last option in the dialog box that appears 'Clear Recent Paths'.
Otherwise try, as an experiment, to create a new catalog and impoprt to that and see what happens.
The results of this test will help determine where the issue might lie.