Hi
I had exaclty the same error. The way to get your site working again, is to go the the line identlifed by the errror, and delete it the whole function that starts at this point.
When you do this then the FastTemplate system will work again.
I have had to do this on a number of sites, and now they all work. The redeclared function is not used, the comment associated with the function clear_parse() (the second occurance of it) tells you why.