Hi sorry for the delayed replies.
Removing the ids and access keys will not cause a problem.
For editting the about text etc, open
I have no clue about the users profile page.
Are you running Reloaded on your site?
Anyway current version is 1.2.2. Recommended you upgrade to it.
Regarding the menu at the bottom. That happens because your post text or you have a big image. Unfortunately you can't do anything much except reduce the width of that image.
div will not help as the positioning is using CSS.