Advisory: Feed subscription can cause the wrong page address to be displayed
It has been reported that when a user subscribes to a news feed using the feed subscription button, the page address can be changed. This causes the address field not to update correctly. Although this can mean that that misleading information can be displayed in the address field, it can only leave the attacking page's address in the address bar, not a trusted third party address.
Opera Software has released Opera 9.52, where this issue has been fixed.