css joomla bug fix

TASK 1 I am running the latest joomla 1.5 and kunena latest version and js fresh template. The problem is that suddenly a parse error has appeared above kunena forum only. This is the error: XML Parsing Error at 1:7104. Error 4: not well-formed (invalid token) when I unpublish the Kunena menu it disappears. here is kunena topic on this subject: [login to view URL] Tried the usual unpublishing usual suspect plugins and modules etc but did not solve the problem. TASK 2 The other little task is to move up the banner add above the top menu by a few pixels but not sure where to locate the css code for this in the main template. TASK 3 There is also a css bug with menu position1 where the banner does not display correctly this happened when I installed a third party menu module. This too will require some css skills.