This old question how-to-find-new-poles-for-old-tent showed up in my list of questions. The list says "modified yesterday fred 1" but I see no apparent activity by anyone named fred or anyone else. What's happening?
Basically, Fred with a reputation of 1 posted a now deleted answer and it shows up as last modified by Fred. Not always, but given the new users rarely ever bother to edit their posts and a rep of 1 is usually a sign of spam or low quality, its a really good guess.
You need 2000 rep to see deleted posts.
The user, "fred", wrote a new answer. That's why the question was bumped to the top of the list.
It turns out the new answer was just a rant, and didn't answer the question. Three users with sufficient rep, in this case Charlie, imsodin, and myself, apparently flagged it as "not a answer" (or maybe voted to delete it, I don't remember). When enough users do this, the answer is deleted without mod intervention.
Since your rep is below 2000, you can't see deleted answers. You can see the question bumped due to activity, but you can't see that activity in the question. Here is what it looks like to those that have sufficient rep:
The pink background warns us that the post has been deleted. I deliberately didn't copy the content of the post since it doesn't belong here, and I don't want to give "fred" a grandstand for his rant.