Drupal 6 tinymce button layout problem

We had a problem today with tinymce on Drupal 6, with a large number of buttons enabled the width of the tinymce button area just kept on growing - not pretty

Adding the following CSS to our Drupal 6 theme solved the tinymce button problem

.defaultSkin table.mceToolbar,
.defaultSkin tr.mceFirst .mceToolbar tr td, 
.defaultSkin tr.mceLast .mceToolbar tr td {
  float:left;
}
<p>.defaultSkin table.mceToolbar{
float:left;
}
</p>