immortal tags?

[nunziocastaldi]

Hi from Italy and sorry for my bad english:

[bug in FF (v 2.0.0.7): it works correctly with IE7]

1. load the following code in the source:

<p><u><i><b>hello</b></i></u></p>

2. back to WYSIWYG and delete 'hello'

3. back to html mode: the 'hello' will be correctly deleted, but the tags are still there

[martinkou]

This is a dup of #1340.