IE tables problem

In Firefox/Sea Monkey everything is just fine, but IE causes problems.

When you look at the tables you see that Internet Explorer, breaks the text of combined cells whenever there is a cell below or above.

Checkout for example the News table on my frontpage in IE and Firefox and see the difference:
http://www.destinydealers.de/

Please help.
:)

A document with 214 HTML errors (http://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Fwww.destinydealers.de%2F) (even 307 if you were writing real valid HTML (i. e. XHTML strict)) just can’t work alright everywhere. Fix these and we’ll have another look.

Well on the frontpage most errors come from the = and & of PHP links and I have no clue how to fix this as they are dynamic.

Nontheless I reduced some sites to zero Validator mistakes, but the table problem remains:

http://www.destinydealers.de/members.html
http://www.destinydealers.de/achievements.html
http://www.destinydealers.de/imprint.html