I’ll join.
I’m having the same problem. No matter what I type in to the code textarea, nothing is kept when I hit publish or save.
WordPress seems to be adding a lot of useless inline-styling and tags. I’m about to, nope, I just went crazy.
I’m glad you asked this, because line-breaks and the overall issue is driving me nuts.
Apparently, wordpress is doing quite a few operations when you hit ‘save’ or ‘preview’ or simply switch from the ‘visual’ to ‘code’ tabs.
I was hoping that whatever I typed into the textarea in a post, would be posted verbatim, without adding garbled css inline styles, tags, etc.
It’s driving me nuts.