Suddenly my Stack Overflow reputation went down to 1 from 379, and I cannot see the reason for this from my reputation page, I mean there's no -378 entry. But when I click this link, I can see that my reputation is still 379. What's the explanation of this? Or is this some kind of an early April Fool's Day activity?
Many of your answers have been flagged as spam.
-100 for each, so you reps is now 1
I am not sure those are spam, and I didn't flagged it as such, IIRC.