I tried using yahoo advanced search to find that comar error, but didn't come up with anything, but I suspect it is a python error which goes back to this conflict:
[python-qt-webkit conflicts with: PyQt release <= 42]
I have Pardus 2011.2 with testing repo and it is using python-qt and python-qt-webkit versions 4.8.4 release 57.
If I were you, I would do:
pisi it --reinstall python-qt python-qt-webkit
before doing the mass install of packages, and if it says it needs extra dependencies for that action, let it get them too and then do the remaining packages. Just guessing.

Thanks Lisa, but I couldn't do that. There's no gap in the process to allow it and pisi seemed to take care of that by itself. I think the script error was perhaps referring to the libuuid package but what it meant is anybodies guess.

What I decided to do was to replace P2009.2 with my backup image, uninstall the two broadcom wireless packages to eliminate that conflict and then try again with Upgrade Manager. This time, it downloaded and installed the packages and all went well untill right near the end of the process when everything was being configured and then the system abruptly rebooted. Saw some errors, then Plymouth came up and I saw another error about not being able to locate the logon splash theme. Clicked past that and got a text logon prompt. Logged into my account and tried:
startx
Xserver loads, then the splash with the icons appearing and then the system kicks me out to a text screen again with several screens full of errors mentioning dbus, akonadi and lots more. Seems that the configuring in the upgrade process had not compleated, there must have been another error of some sort and that left the system broken. Oh well, it very nearly worked .

Going to have to do a clean install of P2011.2 (just the system partition) and see how that works out.