Have you installed the latest patch? There was a known bug with media browsing on some set ups (mine was one). That was fixed in the patch and X2 on my studio setup is now as rock solid as X1 was for me.
I do get the odd graphics glitch on my latest mobile setup which I never saw on my old laptop. The difference between my studio DAW, the old laptop, and my new one is that this latest laptop is using NVIDIA graphics and the others use ATI. Perhaps there's something in that, who knows?