Recently Skype has started behaving as if I've never used it before. Every time I start it up I have to agree to the user agreement, log in etc. It used to work properly before and I can think of nothing that has changed to cause this. I've checked the permissions in my Skype directory and they look OK to me, and the directory is obviously filled with information related to my account. Any ideas what could be going on?

In a possibly related bug, I have also recently found that Skype has developed a habit of spontaneously sending a very unpleasant buzzing sound to the speakers which can only be killed by shutting down Skype. I did notice that this happened once at the same time as a notification appeared that one of my contacts had logged on.