DD_Ashy and problems with some column widths

Hello, I am running an informational site in Joomla for bands in the low countries. The site looks okay on IE7, Firefox & Safari but somehow in older browsers (and also sometimes in IE7) the content of the main column seems to big for the width as defined in the defaults of dd_ashy. Also some components will go beyond their boundaries. Which parameters should I change in order to get the site working properly, I am not exactly a wizard with CSS templates! :) If anybody could drop me a line and help me out on this, I will be grateful for ever and years to come after that! Best regards, Pascal.

p.s.

you can find my site at http://www.coverbands.info