I am not sure even how I've done this, but I think its like this:
I had two or three tabs opened, so I got logged out. But I've forgot that, and on the other tab, I've made an edit (removed tag which is not related to the question). Next what was happened is that I got message which says:
"Thanks for your edit, it will be reviewed ..." Because, I have more than 2k rep, I logged, and approved my own edit :) Here is the link
It says edit proposed by anonymous user (which is me :) and approved by me... I think this is a bug ;) Because we shouldn't have the ability to apply edits when logged out.