DIV and Paragraph beheaver in 2.1.2

This is crazy, I’ve been reading lines and lines of commets in the forurm about the problem with the div and the paragraph in the visual editor since Ella (WP 2.1) was launched, and the problem IS NOT FIXED YET!.

Please can anybody tell me how to fix this problem. I’m feed up of visiting old post to fix the code because people are editing them with the visual editor on. Yes, I can use the code editor, but not everybody fell comfortable using it.

I added the “magic” line below line 66 in wp-includes/formatting.php as say this track, I changed the line 25 as was commented here by silence226, and nothing of that solve my problem because in one way or another my code is allways altered.

I hope somebody can help me with this bug.

Thanks