Not really sure how to test?The first is very important, it needs thorough testing asap
It worked before and works now. I swapped between Trinity, JWM and Openbox.
Previous to this install have upgraded from 517 to 518 and then 519
I was having to reinstall a major browser through each upgrade.
I also used PPM to uninstall about 10 programs that were patches, now part of the ISO or no longer required. This went smoothly and without any incident that I could discern.