My IE does not display the generated TOC or the tasklist entries (you need add a couple of entries into the tasklist to see the issue) in a card. This happens only with the IE. I guess it is something to do with dynamic contents.

You can see the issue in the following simple page:

{composition-setup} {deck:id=myDeck} {card:label=tab1}
test tab1{card} {card:label=tab2} {dynamictasklist:test1}{card}{deck}

In my original project page, IE does not display the following

{float}{toc} either. It is a simple page with some headers. When I move the mouse-cursor over the area TOC should be drawn I can sense the TOC is really there (the cursor chages and can be clicked to jump to the headers) but the TOC is not displayed or displayed poorly.
{float:right|width=180px|background=#F0F0F0|border=solid navy} {toc:style=none|outline=true|indent=7px|minLevel=3}{float}

Cisco Call Manager

 

Unified Messaging

etc.