I'd run a test with only Lightroom running to make sure it's not a Lightroom bug. Then I'd add other programs that are running when it happens until I hit the notification.
Thanks for replying.
But thats the problem, I don't have any other programs running. Something is opening automatically by itself intermittently and I can't work out what. I need Lightroom to let me which program it is that is trying to alter the metadata.
Are you adding metadata on the way in via the Tethered Capture Settings Dialog? Maybe try with and without?
I've had a look at the TC settings dialog and tried to keep it as simple as possible. I also had a copy of LR 4 on the hard drive so have trashed that also incase of any conflicts. LR seems to be running ok now but as said it's an intermittent problem.
I also have a copy of Capture One on the hard drive so am going to uninstall that also in case it is trying to launch.