problems with W3c

Hi,

My name is Laurence, I have test my website in your online program and found html mistakes.
This is the website : http://ca.geocities.com/stafterearth

So, this morning and went and look at my site to see where was those mistakes and found none,
all the tags mentionned are there.
I use OpenOffice html program to make my website pages.  I can prove that there isn't any
mistakes and just wonder if your program takes in consideration the OpenOffice program to make
html pages.

Laurence