I am going to guess that this is a video card problem as it appears like an area of the display that did not clear properly. Try looking for a driver update for your card. I have never seen anything like this in CNX2.
No, CNX doesn't use such a dialog boxes for metadata.
I have see something similar to this occasionally when using the High Pass Filter. Generally, if it happens, you need to save the image w/o a High Pass edit step. Close CNX and then restart and reload the iamge.
I experience this phenomenon occasionally, and it is definitely related to the use of the high-pass filter. When it happens, I simply re-open the nef file in CNX2, delete the high-pass edit step, re-apply the high-pass edit step and then re-save the file. Works every time. I've not found it necessary to save the file without the high-pass edit step or close and re-start the application.
Thanks for bringing us that reply from Nikon four eighty sparks.
It's extremely disappointing that they claim never to have seen this!!
I've had these blobs appear many times during my CNX2 editing, and it's clear that others here on Nikonians have also seen them ... so my optimistic assumption that "Nikon will soon fix this common flaw ..." has been stupidly naive. GGGrrrrr!!!!
> (....) so their suggestion is to uninstall and reinstall CNX2.
That response from Nikon IMHO is a technically limp, weak and (for most of us) futile non-answer!!! How really sad.
I love my Nikon and I love what I can do with my photos in CNX2 - and yes I'll admit I'm reacting a bit OTT to Nikon's reply to you (I'm having an iffy day today!!!) - but how much better it would have been if Nikon had replied with a simple acknowledgement and a "thank you, we will investigate this thoroughly and we'll aim to cure it soon ..."???
I had the same problem occur today and have also opened a ticket with Nikon Technical Support. A screenshot of the problem is attached here. The artifact was created in Capture NX2. It was small and unexpected so the artifact remained when I copied the NEF into another folder using the Save As command. The artifact remained when I did another Save As and created a JPEG.
I was able to go back to the original file, open it, and make a small adjustment and then Save it - and the artifact disappeared.
My case number is 120712-000808 just in case somebody at Nikon says they have never heard of this before.