[VE][108] Error Message Feedback

Validating http://www.seizewell.mine.nu/stm/
Error [108]: "there is no attribute height="520" in  <table border="0" 
width="100%" height="520" style="overflow:auto"><tr><td id="content" 
valign="top" align="left">

[  Why is this an error ?  It works, and i need the height there.
Follow the instructions at
http://validator.w3.org/feedback.html#errormsg ]