This is an annoying problem where chinese or lots of strange characters appear at the top or at the sides or at the botom  of the customised page.

The solution for me was sometimes checking all the DIV tags matched up, but this didn;t always work so the other solution was to put

<!--adfos tip--><noscript><!-- notesninjas -->

at the bottom of the customised pages page.htm and listfolder.htm etc,

This trick is used to hide attachments as well.