Mac OS X 10.3.3 contains evidence of support for a new PowerMac revision:
10.3.2's Localizable.strings only had one model listed:
"PowerMac7,2" = "Power Mac G5";
10.3.3 has:
"PowerMac7,2" = "Power Mac G5";
"PowerMac7,3" = "Power Mac G5";
Mac OS X 10.3.3 contains evidence of support for a new PowerMac revision:
10.3.2's Localizable.strings only had one model listed:
"PowerMac7,2" = "Power Mac G5";
10.3.3 has:
"PowerMac7,2" = "Power Mac G5";
"PowerMac7,3" = "Power Mac G5";