On IE8, the text area automatically scrolls down each time the user types a character

Steps to reproduce:

• Open a wiki page in IE8. It's preferable to use a document which already has some paragraphs, like "Sandbox.WebHome".
• Edit the page in "Wiki" mode
• Start typing anywhere in the page and notice that editing area automatically scrolls down.

The quick fix could be to add the following rule to "ie-all.css":

#xwikieditcontent textarea#content {
	width:99.9%;
}