Problem: Posts are not visible, but they can be highlighted.
Example: http://balbulak.kz/?p=452
You can see that the post is long, and you can scroll down. If you click 'CTRL+A' and then scroll down, you will see that the content is there, but i can't reach it.
Approach: I tried to change settings of the font color didn't work. Also, content published in pages is present, and is visible, but this error baffles me. I've never experienced anything in my experience.
clearfixclass on them, which for some reason sets them to hidden visibility. Use Firefox+Firebug or other browser's development tools to debug. As CSS issue this is off topic here. – Rarst♦ Oct 29 '12 at 0:30