Blogger wants bloggers to participate in social networking. They have encouraged this, for a long time, using the "Email Post Links" icon. Recently, they improved on the latter option, with a small set of buttons for sharing posts in the most popular social networking platforms. Now, our readers can have the option to easily share our posts using Email, Blog This!, Twitter, Facebook, and Google Buzz.
The new "Share Blog" Buttons are a part of the post template. Just like every other post template component, they are selected using the "Blog Posts" gadget in "Page Elements". Blogs with older templates may not have the required post template code, to make this option work.
If you use "Blog Posts", enable the Share Buttons, and still don't see the new buttons on your blog, reset the post template. Remember to backup the template, before and after making this change.