Site appearance is not correct in all browser

Hello,

I have a blog running at https://blog.techiezone.in

This blog appears fine in some browser and in some it breaks…>So I tried validating it. This has some errors and I have no clue to correct the error.

For example the home page appears fine in almost all browser it is the issue with single post page. So I tried validating single page and found error.

You can try validating a single post :

https://blog.techiezone.in/2008/02/show-current-music-track-in-google-talk-in-vista/

You can validate it at :

https://validator.w3.org

Please help me.