Why don't I supply my CV in Word format?

Principally because Microsoft's file formats are closed, proprietary, and tied to the Windows platform. Micro$oft is a convicted monopolist, and has proved willing to go to extraordinary lengths to extinguish its few competitors and extort ever more money from us all. Its infamous file formats are finally being 'outlawed' by several large public-sector organisations around the world. I use the free Linux operating system on my computer. I don't use Windows, and I don't own a copy of Micro$oft Office. Incidentally, a full retail copy of Office 2007 (Standard edition, let alone Pro) now costs more than some perfectly adequate desktop PCs. My CV was created using the excellent, FREE OpenOffice 3.1 suite.

Yes, I actually care about this stuff....

My CV is maintained in OpenDocument format (which recently became ISO 26300) and distributed in Adobe's Portable Document Format. These are both cross-platform standards that can be viewed and printed by anyone, on any type of computer, using freely available software. OpenDocument is now supported natively by almost all productivity software suites. M$ Office can't quite handle it natively, but this plugin might help.