error with ol/ul lists

Hi,
I found a bug in tinymce, try this:
generate (using wysiwyg) a list (ol, ul doesn’t matter); it will genereate something like this:

• test

Then, go to “text” tab to see source code: place the mouse pointer to the end of this line:

• test

(Exactly after the last “>”). Go back to the wysiwyg tab. You will see that this list has changed. Going back to source you will see this code:

<li style=”list-style-type: none;”>

• test

Replicating this action will increase the number of “inconsistent” ul/li elements. Can you help me?

Thanks a lot.
Marcello