~~snip~~ Today, I've had to take ZA off my XP SP3 with MSE because ZA no longer plays well with other software (MSE, IE8,...).
I don't recall the version before zaSetup_91_007_002_en.exe. Every new wireless connection required user intervention. But other than the non-stop annoyances, at least ZA and my computer still worked. I uninstalled and reinstalled 5 times trying to find a way to turn off the Internet Zone thing. No joy. But the real problem with zaSetup_91_007_002_en.exe was that zlclient hung on boot. It would chew the disk forever for some unknown reason, and only ctrl-alt-del and stopping zlclient.exe would solve the problem.
At least the menus are partially fixed in: zaSetup_92_044_000_en.exe, but now IE8 lags on startup and when opening new tabs. ~~snip~~