I have a perculiar issue. In IE8 standards mode text replaced by Cufon.Replace works roughly 50% of the time, the rest of the time the DOM modifications are there (viewed through IE developer toolbar in IE8) but no text actually appears.
Sometimes have to refresh the page a number of times to be able to recreate it; others it works first page load - this is the case for a site you have never visited.
The Cufon.Replace isn't throwing an exception or producing any other issue. Googling hasn't helped - others mention issues in IE8, but this lack of text is permanent and not just a slow loading issue.
EDIT: Interestingly wrapping the Cufon.replace in the $(document).ready(function(){}); stopped it from ever working! Something in the DOM is to blame... I presume
EDIT 2: Applying the Cufon.replace manually once the page has fully loaded works. This is strange. Is there a later event than ready?