Plasmadog: @Forgotten - Thanks for that. That's what I have now after the upgrade too, so there must be something else causing my market issues.
Is the product code still in tact?
Anyway I remembered this from the Aussie Whirlpool forum:
Restricted market access (protected apps are hidden)
It appears the only white-listed beta version is JPH, meaning the Market must be tricked into seeing your phone as running JPH.
- Open the file /system/build.prop with a program such as Root Explorer
- Find the line beginning with "ro.build.fingerprint"
- Within that line, replace the text such as "XXJPK" or "XXJPC" with "XXJPH", "XXJPM" or "XWJP6", save and exit
- Reboot to take effect