Finally, it works with 7.2.

Installed CyanogenMod 7.2 with Rom Manager, rebooted.

Then installed Hotfix Chooser and chose hotfix 2 (because choosing the hotfix to go with the actual CM install just gave a "corrupted zip" error) and rebooted.

Finally have CM 7.2 working with outgoing call voice.


*Now* everything I wrote in the orinal post applies. ;)



Files on the server now include the hotfix2 (galaxy5-v2.0-hotfix2.zip) and reuploaded (just to be sure) version of CM 7.2 (update-cm-7-20120206-MADTEAM-galaxy5.zip).

And also ODIN 4.28 and the OPS file I used - flat out forgot to upload those, sorry. ;)