Importing of everything but images seems to work fine. But for each image, there is an error message that concludes with the text:
[function.copy]: failed to open stream: No such file or directory
I tried moving the source and target databases to a host on which I have control of php.ini, etc. and made sure the necessaries documented in the FAQ were enabled. Those were necessary to import posts, etc., but it didn't help with images.
On both servers I tried making the destination uploads folder world writable. That didn't help. In both cases the target directories are created, but no files are put in them. I also note that in both cases, a file that I uploaded through the normal WordPress mechanism did not actually get deleted, even though it was deleted from the Media Library list in WordPress.
I notice that in the error message, the target destination is given in terms of the server's file system, and not in terms of target URL. Is that correct?