eZOE does not save the width of a table

Steps to reproduce:

1. Edit an article in eZ Publish 5.1 in IE8;
2. Create a table (e.g. 2x2) in eZOE;
3. Disabling the online editor will reveal that the width parameter isn't included in the table definition, even though it was specified in the table creation popup window:

<table class="default" border="0" custom:summary="tst" custom:caption="">
  <tr>
    <td></td>
    <td></td>
  </tr>
  <tr>
    <td></td>
    <td></td>
  </tr>
</table>

4. As an additional test, and still with the editor disabled, manually enter the width...

<table class="default" border="0" width="100%" custom:summary="tst" custom:caption="">
...

...and then enable the editor. Table width looks OK, according to the value that was specified, but if you disable the editor again, the width is gone:

<table class="default" border="0" custom:summary="tst">
...

NOTE: this affects with as percentage and also as pixels.