Jim, I see the same on my box also. I click on "Browse," select a picture(s) from a file, attach it, and then hit "post". It appears to begin uploading and then, magically, the page goes blank and no post is created. The first time I tried this process, I loaded 5 pictures and, upon rejection, I thought that the file was too large. I got down to 1 picture and still had the same issue.
This process appears too easy to screw up, but----------. I'm at a loss to explain it.
Thanks for you help.
Frank