[IE] incorrect enter key behavior into pre block

[Karen Ananiev]

1. Insert the following html:

<p>
	123456</p>
<pre>
123456
123456


</pre>
<p>
	123456</p>

Switch to WYSIWYG mode and move cursor after the "2" char in the first line of the pre block. Hit Shift+Enter. The new line will appear after the "5" char.

2. Html:

<pre>
123456
123456
123456
123456</pre>
<p>
	123456</p>

Switch to WYSIWYG mode and put cursor to the end of the second line of the pre block. Hit Shift+Enter. Cursor will appear at the start of the 4th line instead of the 3rd line. Toggle to source mode: note that line break disappeared.

[Jakub Ś]

Scenario 1 has been reproducible in all IEs from CKEditor 3.0.

Scenario 2 - Well I have managed to reproduce it only in IE9 (from CKE 3.0) and only that part with disappearing break. I didn't get cursor appearing on 4th line.