[Eq4bits]

Looks to me like if you change that 'cell' just before the one that contains the word 'Forum' needs to be changed to the size of the icon that fills it in the forum list on the page... when you collapse you are no longer displaying the row with the cell that contains the image so the cell width is no longer filled.

find:

<td class="thead">&nbsp;</td>
      <td class="thead" width="**%" align="$stylevar[left]">$vbphrase[forum]</td>

(asterisks for percentage value)
and add a percentage value to
[code]<td class="thead">&nbsp;</td>[code]
that would be the equivalent of the 29px that the icon gif is (depending on what layout you use for your board and the percentages used for the other 'columns').
for example

<td class="thead" width="5%" align="$stylevar[center]">&nbsp;</td>