Indeed, I've seen something like that before with my blades - turned out it was my network.  I know I keep harping on that, but it was the root of so many of my and others' problems.  Anyway, what do you do at those times, or what automatic things happen at those times (keep in mind the time shown might not match your local time)?  Does it do this if you've got nothing else running/hooked-into your network (like cellphones on wifi, streaming video, etc)?