Featured Images Fail on XML Import to Multi-Site Blog

Hi -

We did the standard XML export from a category of posts on one blog, so we could import at a new blog on a multi-site.

Our problem is that everthing imports fine except for two things: the images do not load into the media gallery, and there are no featured images set (important because the theme uses those). The images are viewable in the posts, but a check of the URLs shows they point back to the old site, and a simple update of URLs will not fix the featured images problem.

Anyone run into this and found a fix? Your help appreciated.

- Scott