Hello! I looked around a lot and could not fix the problem.
I am using siteground template (http://joomla15.siteground.com/? template=siteground-j15-82) with joomla 1.5 . I have the vertical suckerfish menu on the main menu position (left) and I had to change the width to 20em, because of the long menu text, so the right border of the suckerfish is aligned with the vertical line on the right side of the menu. The problem is : All the modules on the left beneath the (enlarged width) superfish menu are not displayed properly. They are displayed over the suckerfish module on the right side, where the width was added to the superfish menu. Thank you in advance