Many older Blogger templates include a meta tag that forces all versions of Internet Explorer to behave like Internet Explorer 7. Because Disqus supports Internet Explorer 8 and higher, this will break functionality and users won't be able to comment even with the latest version of Internet Explorer. Below are instructions on how to fix this.
1. Go to your blog's Template section and then click the "Edit template" button
2. Locate the following line within the <head>...</head> tags:
<meta content='IE=EmulateIE7' http-equiv='X-UA-Compatible '/>
3. Replace it with this line:
<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE; chrome=1" />
4. Click Save Template to apply your changes.
If you're using a new Blogger template and the above meta tag is not already in the template, no changes are necessary and IE readers will be able to view Disqus comments.