Fabio,
YES.....if I change assigned specific keyword letter, as U, to immediately send/upload image avoid Uploader Window, I'll not able to write U word into IPTC field.
But, for me in case of my specific fastest workflow job, is not essential write different caption. I write only one caption and I get my precompile IPTC standard through setting into Uploader Window.
And of course, we could assign a different and particular other specific keyboard letter, an unusual, that don't need for write caption,,,,,to avoid this kind of trouble.
but I think, for me sure, this little tool has greta to simplifying workflow digit when we have to obliged to work in little space, under umbrella, under raining, during a match.....
When we are in a lot of particular condition that obliged to digit with only one or two fingers.........to refresh images, Preview images, Crop images, Send/Upload images......
I'm sorry, but that sounds horrible.
-Kirk