Formatting fails when foto in table cell

In theme Twenty Ten 1.2: When there is a picture in a table cell then text in other cells of the same row will start at the bottom of the picture. You are not able to correct that by e.g. <td valign="top"> or so. In which css file I can change that behaviour?

Example:

http://www.hr-schmitz.de/derganzerest/?page_id=47