When I try to use Meta-Ctrl-< in Emacs while there is some text selected, OmniOutliner pops up and tries to insert the text as a "Default Clipping", which is terribly annoying, to say the least. After some looking around it seems to be a "Service" that can be turned off:
You need to remove the OmniOutliner Professional.service file from ~/Library/Services
If you want to use OmniOutliner, you can changed the clipping shortcut through the OS X keyboard prefs or using some other app that will modify service shortcuts for you.
and also
Yes, I did restart after deleting the .service file. I did however find a .plist file (as your colleague suggested) related to OmniOutliner somewhere and once that was gone I am now rid of error messages as well.
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