invalid html generated by wysiwyg editor

to repeat:
First open a javascript console so it is there when you need it....
Open a WYSIWYG editor over a blank page.
Click [Table] -> Insert Table, Insert the table as default clicking [insert table]
move the cursor 8 spaces to the right with the arrow key so it is on the outside edge of the table.
press enter once
click the button to insert a bulleted list.

In the javascript console, paste the following:

document.getElementsByClassName('gwt-RichTextArea')[0].contentWindow.document.body.innerHTML

Notice it prints invalid HTML as follows:

<table><thead><tr><th>&nbsp;</th><th>&nbsp;</th></tr></thead><tbody><tr><td>&nbsp;</td><td>&nbsp;</td></tr></tbody></table><p><ul><li><br></li></ul></p>