Welcome to the forum.
Can you please provide more information, such as your computer's specs., and especially the full details of the files, that do not Import properly?
This FAQ Entry will be useful to see what info would be greatly appreciated: http://forums.adobe.com/thread/961741?tstart=0
For more detail on getting the info of those problem files, plus some considerations, see this article: http://forums.adobe.com/thread/440037?tstart=0
Hi bill, thanks for your quick response!
Well as I mentioned before English is not my first language but I will do my best to give you the info you need.
I have a Samsung computer with Win 7 installed, intel i5 proccessor and a 8GB ram memory. the photos I try to import are from the hard drive - from desktop, c:/ and etc..
the files I've been trying to import are mostly downloaded from Youtube and converted into AVI, MP4 & FLV formats.
on my computer I'm using VLC media player as my default player.
the crashes are caused by the double clicking on the "assets" on the media browser or dragging media directly into the sequence.
update: now also a JPEG photo that I tried to import caused the same crash..
By the way, I updated the software in order to see if the bug was maybe fixed, didn't help..