When I try to move 100 RAW files (no stacks or versions) between folders, it now takes 3' 30":
- For 8 seconds nothing seems to happen;
- for 1' 12" my 4 lines of 'custom thumb info' are removed, one image at a time;
- then 10 seconds to move the images;
- then 50 seconds to rebuild the thumbnails.
This is repeatable under build 2828, and since updating to build 2872, on more than one folder, after database compaction, and after rebooting the PC (Windows 8.1).
It didn't used to be a problem, but it may have been been a few weeks since I last had to move files.
Not yet reported on Mantis in the hope that there's an easy fix...
[update Hert; changed title and removed “bug” qualification]