I've repeatedly tried upgrading to a Premium Account (wanting to take advantage of the 50% off deal that ends tomorrow). When I click on the Upgrade button next to the membership I want, it takes me to an Invoice page. The page correctly displays both the details of the membership plan that I have selected and my payment info. However, when I click the "Buy Now" button, nothing happens. No error codes or messages, it just hangs. I've tried signing on and off, closing and opening my browser, rebooting my computer, nothing seems to be helping. My payment info on file is correct and up to date and has succesfully been used before to buy linden dollars, so it must be working. I don't know if this is a problem with the website malfunctioning or something within my account that is preventing me from completing the payment (in which case I would expect an error message of some sort...). Anyone have any advice? I hope I can solve this before the discount offer ends!