I've experienced the same issue on random occasions.

J-Mac, I think the best thing to do with ANY of these services is to wait it out. The Google Reader demise has caught MANY of these services off-guard. I tried importing into newsblur and it took me two days to get a successful import. After that, I found the site used a bit of custom code that resulted in huge slowdowns on my work networks, hence, it is out of the question. I think most of these issues will settle down once the influx of new customers settles at each site.