Pretty much a nob here, but I just upgraded to version 3.5.1 and now when I post, the thumbnail image isn't showing on my home page on gallery view. I recall last time I upgraded wordpress, I had to find some box to re-check so that thumbnails would show. Now I cannot find any such box. Also, use twenty-ten theme. Old thumbnails are showing. On not working on new posts.
Wish I had not upgraded.
Any thoughts on how to fix this...any suggestions keep it simple please as I am not a programmer.