Also, once in a while (rarely) after performing a transformation, the main image window opens up black. In those cases, closing it and then repeating the transformation, it is okay.
This has never happened before and nothing has changed on the PC, so I can only attribute it to something with the new monitor and its profile. To be honest I never implemented color management before this monitor but with this monitor I had to, as things looked wonky without it. I'm now using settings as below, although I'm not sure if this has anything to do with the problem.
Any thoughts? Its not a huge deal if I can't fix it, but its annoying :)