I am running on 4.6.5 on a Windows 7 64 bit professional OS. I am working on groups of images - typically less than 150. I do a ctl-shift-I to apply the IPTC pad and get the "There were errors during the apply to selected operation". This is random, I can do it successfully 2 or 3 times then this happens. I have shut the app down and restarted - no change. If I take smaller number of pictures, it may or may not work.
Kevin