I can't either - I hope this isn't another gcc 4.7 issue causing failures in the finished packages. But the size difference was surprising. Slow weekend for making progress. Somehow family holidays have a way of impacting the time available. I built tdebase exactly the same as I had 6 days ago and I expected the new package to be a one-for-one replacement for the current tdebase. I was quite surprised to get the desktop crash.
I compressed the xsession-errors file [26k] and made it available for anyone interested here:
http://www.3111skyline.com/dl/dt/tde/err/tdebase/kcminit-xsession.txt.xz
What happens when you rename your existing profile directory and start with a fresh profile?
What happens when you delete the ksycoca cache? I do this quite frequently when testing. I start X from the command line and this is easy to do. More than a few times deleting the cache solved weird problems.
Darrell