Internet Explorer does not load stylesheet files

I was creating a website with Drupal CMF and experiencedy a problem: the website is displayed perfectly in Opera, Google Chrome, Mozilla Firefox BUT NOT IN Internet Explorer (both versions 7 and 8) . It looked like that Internet Explorer did not load my custom style.css file. After some googling I found out that Internet Explorer CAN NOT LOAD MORE THEN 31 CSS FILES FOR SINGLE WEBPAGE. Funny thing, huh? And I had 37 for a webpage. Well, it looks like that the solution is quite simple: to reduce the number of CSS files by copying content of one CSS file to another.