I have Atahualpa 3.6.7 and with with Twenty Eleven I have no problems.
my site: http://putinrock.com/
1. Look at bottom of the left sidebar - tags stick to each another because there is no spaces between tags.
Any suggestions?
2. I tried many plugins to add AdSence without result could you recommend one, please?
Thanks a lot!

It looks like you may not have the patches for Atahualpa 3.6.7 applied. There are currently four of them as listed below. The issues they fixed as mentioned aren't necessarily all that they fix and it is recommended you apply all of them.

• PATCH 367-01: Odd effects when 'CSS: Compress' = 'Yes'
• PATCH 367-02 is incorporated in PATCH 367-04
• PATCH 367-03: PHP errors when adding widget areas in index.php
• PATCH 367-04: Hovering over a Post/Page title only shows "Permanent Link to"
• PATCH 367-05: Site Title appended after the 'WordPress SEO by Yoast' title