add in default.css somewhere under: #product div.content{clear:left;.... this: #product div.content p{word-wrap:break-word;} (is a css3 property - will work in rather new browsers)
I tested it on 3.7 Now took the 3.0... and: this property-> word-wrap:break-word You have to put into #product div.content{... because as I see, in 3.0 the description text is not in p element, but direct in div (class content).