Something is really affecting me. One of my sites has been at #1 or #3 for 8 months for keywords Coat Check Tickets on Google.ca (not Google.com). Last week it was #862 and this week they don't even list that many results, only up to 622 or something, so not even listed. I haven't changed anything and never did anything blackhat. Never been high PR, 2 I think, now 1.
I hope it comes back!