Not that it matters, but my site had a few images at most. It’d be nice if the importer displayed an error message, or better yet, wrote out a log we can access to see what might have gone wrong. I do not have easy access to the server logs, plus, they are huge. I cannot start recommending WordPress until I can verify that sites can be cloned without too much difficulty.
I have the same problem, and my exported file is only 46K (a very small site). I tried changing the filename, and putting the file in different places on my PC (Win7), all to no avail. I’m using 3.3.2 on both the source and destination sites.