And its integrated!

It works fine in all browsers now... but in IE6 it seems a bit intermittent. That is, it'll work several times, and then just stop working totally until page refresh. Is this just my browser or is it something to do with the code?
Update: Ok, it seems that the tooltips appear relative to the page. i.e. as you scroll down they display further and further away. Any idea how I can correct this Eagle?