On the right hand side, a user can add some tags under the interesting tags section. And when the user click on one of the interesting tags, he can see only the questions which are tagged with the tag he clicked on. However, the interesting tag section has disappeared. So if the user wants to see any other interesting tag, he has to first click on Question tab (on which he can now see the interesting tag section) and then select any other interesting tag.
It would be really convenient, if the interesting tag section is available on all pages, so that the user does not have to go to the Questions tab to see the section.