I'm using the semperfi custom foundation 5 skin and semperfi plugins so no code that is not semperfi has been added. I just changed to the normal foundation skin and am having the same issues. Sort does not work and search does not bring up the correct products, an example is that if you search 'foam bo', the semperfi ajax dropdown search brings up the correct products where as the cubecart search results are incorrect products.
It does seem to be the issue on the link but I was wondering if anyone has found a quick fix until the bug is sorted?
This is quite a big issue coming up to xmas as everyone uses search to find specific products.