Other than this little problem, everything seems to work.
I went through all of the menu options, no mishaps. Switched on *everything* on the CHDK OSD - the layout looks pretty good.
I pushed things around using the OSD editor , no worries.
Palette colours look fine.
I also ran a bunch of scripts, flattened two batteries (the SD430 eats batteries any way), without a single hitch.
If we get the auto-boot fixed I think we can declare the Ixus Wireless - SD430 port, at the very least Beta.