If it is a 1 px gap, this is because I think the module is adding a 1px padding somewhere.

I would suggest to use <div and place it as background

Or alternatively create a skin just for this which has it hard coded

Salar

And you might check the document, since it has a lot of validation error's

These can cause browser rendering differences too.

Using XHTML transistional makes it a lot easier... (not strict as I wrote)