If you download a blogger template from http://www.premiumbloggertemplates.com/ and not displaying Blogger share buttons or only showing blank space, then follow the steps given below to fix that problem.
Go to "Edit HTML" and check "Expand Widget Templates".
Find this and remove it(If you can not found it,skip this step):
<b:include data='post' name='shareButtons'/>
Now find a similar code(not exactly similar) to this:
<b:includable id='shareButtons' var='post'> <b:if cond='data:post.sharePostUrl'> <a class='share-button sb-email' expr:href='data:post.sharePostUrl + "&target=email"' expr:title='data:top.emailThisMsg' target='_blank'> <span class='share-button-link-text'><data:top.emailThisMsg/></span></a> <a class='share-button sb-blog' expr:href='data:post.sharePostUrl + "&target=blog"' expr:onclick='"window.open(this.href, "_blank", "height=270,width=475"); return false;"' expr:title='data:top.blogThisMsg' target='_blank'> <span class='share-button-link-text'><data:top.blogThisMsg/></span></a> <a class='share-button sb-twitter' expr:href='data:post.sharePostUrl + "&target=twitter"' expr:title='data:top.shareToTwitterMsg' target='_blank'> <span class='share-button-link-text'><data:top.shareToTwitterMsg/></span></a> <a class='share-button sb-facebook' expr:href='data:post.sharePostUrl + "&target=facebook"' expr:onclick='"window.open(this.href, "_blank", "height=430,width=640"); return false;"' expr:title='data:top.shareToFacebookMsg' target='_blank'> <span class='share-button-link-text'><data:top.shareToFacebookMsg/></span></a> <a class='share-button sb-buzz' expr:href='data:post.sharePostUrl + "&target=buzz"' expr:onclick='"window.open(this.href, "_blank", "height=415,width=690"); return false;"' expr:title='data:top.shareToBuzzMsg' target='_blank'> <span class='share-button-link-text'><data:top.shareToBuzzMsg/></span></a> </b:if> </b:includable>
Delete the above code.
Now add below code just above the </head> tag.
<script type="text/javascript" src="http://apis.google.com/js/plusone.js"> {lang: 'en-US'} </script>
If you want to show share buttons below blogger post,then paste your code just after <data:post.body/>.
Blogger share buttons Code :
<div class='post-share-buttons'> <b:include data='post' name='shareButtons'/> </div>
Save your template.