I created a new thread with this particular issue because i don't know if this is completely related to new servers...
In fact the Paypal window opens correctly, you log in to paypal, then have the button to pay for your transaction, you click on it and nothing happens...
If you cut that little paypal window, the Store window ( with the Paypal logo up right) comes with 'Loading' at the center and nothing more happens... infinite loading
You have to close the store... i verified on my Paypal account, it seems that Nothing was charged anyway ( good!)
Hope you'll fix it...
From Belgium, on Sirannon, 17.00 GMT+1
Ho, and btw, often laggy (> 2/3 sec in combat) in the Moors ^^
Good luck ^^