How are you importing?
plugin? import dialog box??
Importing using the free plug-in provided by Adobe in their website - yes it's a plug-in.
OK - thanks, but which plugin exactly are you talking about? (what is it's name in plugin manager? or can you provide the link to download?)
Anyway, whatever plugin you're using has a bug - consider reporting it to Adobe here (if it hasn't already been reported):
For now, I think you'll need to find another way to import those problem files (or do without them until the bug is fixed) - either import dialog box, or another plugin..