Recently I updated to the latest GimpPortable using the auto install method through PAM. This is not the problem, it worked flawlessly and all of my settings were retained The question I have however, is if this method is recommended for all applications, particularly gimp because...
I ran into a small problem the other night trying to edit some photos I took in Greece. They're 7 megapixel, and from a 3meg jpeg inflate to about 40 megs a layer. I duplicated the background layer 3 times to apply some affects and adding another blank layer would cause gimp to lock up for minutes at a time.
This was never an issue before with the previous Gimp that was packaged with the software suite. So I had a go with that Gimp doing the exact same procedures with the same picture and experienced no problems. I tried the same thing again in the problematic Gimp (upgrade install), and it locked itself up once again.
For my next attempt, I did a clean install of GimpPortable instead of just upgrading the existing version like I had done prior. Everything worked as expected this time, no lock ups!
If you experience any problems, you too may want to try a clean install if you've recently upgraded.