The example programs we ship as part of TLDC have icons defined for them, however the icon paths don't exist. Microsoft Word has for example /opt/thinlinc/share/icons/microsoft_word.xpm which we're not shipping.
This is by design as there are copyright issues with shipping Microsoft's icons. We don't have any better ideas at the moment, but keeping this bug around in case we come up with something.
We removed these applications in r34005 for bug 7279.