I have two blogs on my account. One is micro,blog hosted; the other is self-hosted. I’ve posted to both of these this morning, and some photos are not appearing on the blogs, (but some are). If I go into uploads page (the thumbnails for the offending images are blank, but clicking on the URL I can then display the image. They’re also not cross posting to threads and only some are posting to Tumblr.
I’m sorry, we had a server issue this morning that very likely caused this. Can you check if all the photos are appearing on your blogs now? If anything was slow updating, it should be there now.
Unfortunately if cross-posting fails, it tries once or twice to upload the photo again, but then it gives up. If it missed anything during this period, you’ll need to manually cross-post those photos, and then it should work going forward.