Comment preview width

In the preview tab for new comments, the text flows in a single line off the page, and I can't for the life of me figure out where in the CSS to add a width entry. Can someone tell me how to fix this theme so that comment preview works correctly?
0
Comments
in custom.css add white-space: wrap;
option 1 around line 582
div.Preview div.Message, ul.MessageList div.Message {
font-size: 14px;
white-space: wrap;
}
option 2
or remove from custom.css on line 178
white-space: nowrap;
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