I've not got to the bottom of this one yet, but 0.75 is a substantial change.
It could be the case that:
a) A CGI::Wiki or OpenGuides site using the latest T::WF will be broken.
b) The failing tests in C::W are harmless
I recommend using version 0.72 until this is fixed.
I've not yet submitted a bug report to Chromatic, as I have not debugged
the failing tests sufficiently to do so.
Ivor.