Large space between the "Posted by..." section at the end of each posts

Just found the most simple way to remove large space and to keep share buttons:
Go to Design > Edit HTML > Scroll down and click "Revert widget templates to default"

Check now, how that look?

Older Solution:
Solution of this issue is simple, just disable Share Buttons for a while, until Blogger fix it.

How hide Share Buttons, follow steps below:
Go to Design > Page Layout > click Edit on Blog Post > un-check Show Share Buttons

If this doesn't work, try other way:
Go to Go to Design > Edit HTML > find ]]</b:skin> above it, add:
.share-button-link-text {
display: none;
}