Hi,
I am currently using PS 1.5.3.1 although I had this same issue with my previous install (1.5.2.0) also.
My cart summary appears to lose all formatting when I click checkout, with products in the cart. It does not happen when the cart is empty though.
(Please see attached images)
I could actually deal with the loss of formatting IF it still displayed a continue button, but as it is it can't be used!
I thought it may have been a php memory issue, but after fixing these I am still having the same problem.
Can anyone help me please? This shop is driving me to the brink of insanity!!
You're welcome to try it out yourself www.gigglebubba.com.au