I was viewing StackOverflow profile page, then click `less info` next to the name.  
When the info panel finish resizing, it block over half of the tab header below.

Here is a screenshot: ![StackOverflow profile less info block tabs' header][1]

I also checked some other sites.

* Android: good
* SuperUser, Meta: block parts of the top of the tabs' header


  [1]: https://i.sstatic.net/7UBky.png