I reviewed a page that a client has edited inside the InContext system and found some disturbing changes to the code.
1)
The page has an image with an <a> tag with a site relative address. She removed the <a> tag and the relative address for the image turned into a absolute url. Not such a horrible thing (shouldn't happen though), but this site is on a testing server. When it moves to a live server, a change like that will break the link.
2)
On that same page, I had coded some text with <em> tags. InContext changed those tags to <span style="font-style: italic;">. A terrible situation if I do any CSS with the <em> tag.
Surely these aren't undiscovered issues.