[SOLVED] CSS/XHTML error! (was MODX bug on images)

hay everyone
i am developing a site using modx CMS. everything did work fine. but at the end i got a error which i can not solve. when i use two images together in a document content, i get a separate line between two images.

check this..
http://www.iti.whsites.net/vajira/index.php?id=6

look at the black line between two images. i have not use any
or <hr> tags between them.its just two <img> tags i used to add two images. can anyone help me with this?
thank you.
contact [email protected]

i solved this,
used
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

other than
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

EDIT: You should change the title of your first post to this -> [SOLVED] CSS/XHTML error!
This is not NOT a MODx bug!

http://jigsaw.w3.org/css-validator/validator?uri=http://www.srilankamails.com/&profile=css21&usermedium=all&warning=1&lang=en
http://validator.w3.org/check?uri=http://www.srilankamails.com/&charset=(detect+automatically)&doctype=Inline&group=0

i am new to this modx and CMS. still did not play much around. anyway thanks mrhaw.

Welcome to MODx!

MODx is different from other CMS out there!
-You use your own code and decide how much you want
MODx to be involved in it.

By Far The Best MODx Documentation: http://w3schools.com/