Hmm, try this:
In sidebar_leftopen.tmpl...
CHANGE:
======
<table width="{$theme['tablewidth']}" cellpadding="0" cellspacing="0" border="0" align="center">
TO:
===
<table width="{$theme['tablewidth']}" style="table-layout:fixed" cellpadding="0" cellspacing="0" border="0" align="center">
In sidebar_rightopen.tmpl...
CHANGE:
======
<table width="{$theme['tablewidth']}" cellpadding="0" cellspacing="0" border="0" align="center">
TO:
===
<table width="{$theme['tablewidth']}" style="table-layout:fixed" cellpadding="0" cellspacing="0" border="0" align="center">
NOTE: I haven't tested this, don't have Opera installed, and don't have this mod installed, so this may or may not work
