Hi Onkel Hatti - you are very good -Groß Hatti
Only one GIMP plugin crashed with 2.8 rc1 Gerald (but not GIMP itself; believe it was the enhanced details plugin but not sure). I ended the plugin and re-ran the plugin without incident. GIMP itself has not crashed yet (but even GIMP 2.6.x would sometimes goe hours or days without a lockout issue, so the verdict is still out). I did go ahead and re-installed 2.6.12 since, as you know, 2.8 rc1 uninstalled any 2.x version of GIMP. Both working fine for the most part. Only issues I've seen so far is tif export error, jpeg size indicator stuck at 1.3G (so you won't know the size of your exported jpeg, but the jpeg will save properly), and also the user filter won't save the guf location (so everytime you use the user filter, you have to point to the guf directory; a pain that I don't think will ever get patched. Don't use this filter that often anyway and am just happy this filter still works). All and all, I'm pretty happy with 2.8 rc1, but the issues will have to be fixed related to GIMP itself, but I suspect it will get quickly fixed.
1. First This is the solution to the problem jpg (1.3 GB) -thanks HATTI !
2. You can temporarily solve the problem tiff:
change the files:
from version Partha 2.7.6 to 2.8 RC1
and add (to bin) libtiff-3.dll
3.Uuserfilter (gufF) -edit file gimprc - paste the path:
Now it all works...