I went through (one by one) and edited all of the index.tpl files and changed:

{if $rightSidebarElements > 0}
<td id="serendipityRightSideBar" valign="top"><div class="sideBarSpacer">{serendipity_printSidebar side="right"}</div></td>
{/if}

to <td id="serendipityRightSideBar" valign="top"><div ...

I created a template with two side sections (in which the plugins reside). However, one of my side sections is not displaying (Side Section 2). When I look at the source code, I didn't see any of the plugins available. Additionally, I see an "End SIDE1" comment, but no "End SIDE2" comment. So I don ...