Huh. Never knew that. I’ll try avoiding it and see how it goes.
Thank you, and I’ll mark this as resolved for now. 🙂
Oops, I suppose I could have been clearer. >_<
I mean using the HTML editor to write posts on my WP installation. This is something it has done at least since I started using it around version 2.7.
EDIT: I’ll write my HTML, then save, publish, update, preview, or just look at the visual editor, then go back to the HTML editor to keep writing to find my code has been modified (generally by adding unnecessary extra tags or otherwise making it overall worse).