At the bottom of every page, there is a small “OK” that i dont know where comes from.
For my problem to be even more tricky, I have the same problem with my feed.
The source of my pages ends in:
OK, I was shooting in the dark…
That “OK” thing must be somewhere in one of the files that are called into your blog. The question is only finding it. As I said, it could be in the theme, including the functions file, in a plugin, in one of the many 3rd party scripts…
The worse case scenario is – it is coming from the database because your blog has been hacked.
Only you can figure it out because only you have access to everything on your blog/site.