I've just discovered the lovely ISP of this mobile broadband I'm using today is "transparently" recompressing all JPEGs I'm seeing. And I've tagged many pictures with jpeg_artifacts before I realised what's going on. So two questions:
1. Does anyone have a script or something handy to remove the tag from all posts I've put it on today? 2. Anyone know how to disable that retardation?
For those with more than just one tag changed, I did it manually. If you look through all the "jpeg_" on the first page with search+f3, you'll notice that only the '+' before jpeg_artifacts turned black.
Edit: what was the solution for #2? (response in edit ok)