Canonise ttD it doesn't work properly. It creates a mess,

[aneurinhunt]

Canonising a truncated truncated dodecahedron doesn't seem to work properly. Below is images showing Cn for each multiple of 100 from 0 to 10. This doesn't happen for other truncated archimedean solids (values in the thousands work fine). The last imagine is from http://dmccooey.com/polyhedra/CanonicalTruncatedTruncatedDodecahedron.html and is how I expect them to look after canonising them.