Rich-Text Editor failed to preserve edits in between paragraphs in IE6

When editing in an existing page with multiple paragraphs, if a newline of text, say, a new paragraph is inserted in between two existing paragraphs, the RTE will not be able to preserve the edits. The edits are lost when switching to "Wiki Markup" or "Preview" mode. If use saves directly from RTE, the edits are not saved. This is a show-stopper for users with IE6 SP2. The issue seems only occur to 2.10. I have tested on 2.9.x and it seems OK.

Note: This issue is present when user clicked on the blank line between the paragraphs and start typing. If user click on the end of pervious line and hit enter, the text enter subsequently can be saved. It is the blank line in between the paragrahs in RTE cuasing the problem. Also there is no way delete that blank line with backspace.

Related Issue: http://jira.atlassian.com/browse/CONF-8440