I have used my Paypal account for iTunes with no problem and they have charged me and given me receipts for purchases, etc. But now, when I tried to buy an app on my iPhone, it's giving me a message that I've got to go on iTunes and fix the issue. It says that there are no funds in my Paypal account and they cannot charge me for purchases I've made. It will not allow me to purchase any more things. What's strange is that there's a credit card on my Paypal account that should be used for purchases, so I don't see where the issue is. These types of things are so annoying! Anyone know what the issue may be?