Sorry if I missed this somewhere else. I searched and didn't see anything about it. Randomly, a sign in will pop up similar to when I buy something from iTunes or the app store. It'll ask for my password. This happens on different tasks... usually related to iCloud. When this pops up, I also get a notification on my Mac saying that there was a problem with my iCloud sign in and to go to my account settings to check it out. I know I'm not being overly descriptive here, but it hasn't happened for a couple hours and I just not remembered to post on here. Is anyone else experiencing something similar? I'll try to post more details next time it happens.