Hi James,
I have more complex contents inside tabs, while they perform OK so far.
Things might go wrong in couples of ways, for example, non-proper ending of </$list> to become <
$/list> ...
Maybe you can share some of your "list filter command" in "subject #1" and etc ...
Another suggestion is to look into the official TabsMacro :
$:/core/macros/tabsIf any variables or parameters go wrong ...
\define tabs(tabsList,default,state:"$:/state/tab",class,template)
<div class="tc-tab-set $class$">
<div class="tc-tab-buttons $class$">
<$list filter="$tabsList$" variable="currentTab">
<$button set=<<qualify "$state$">> setTo=<<currentTab>> default="$default$" selectedClass="tc-tab-selected">
<$transclude tiddler=<<currentTab>> field="caption">
<$macrocall $name="currentTab" $type="text/plain" $output="text/plain"/>
</$transclude>
</$button>
</$list>
</div><div class="tc-tab-divider $class$"/><div class="tc-tab-content $class$">
<$list filter="$tabsList$" variable="currentTab">
<$reveal type="match" state=<<qualify "$state$">> text=<<currentTab>> default="$default$">
<$transclude tiddler="$template$" mode="block">
<$transclude tiddler=<<currentTab>> mode="block"/>
</$transclude>
</$reveal>
</$list>
</div>
</div>
\end