Hello Dan
In working up a folder containing a large number of NEF and JPG images I was troubled today by the very sluggish behaviour of 4.03, and was almost about to reinstall an earlier version! I soon recognized that the problem was due to obligatory creation of thumbnails as a background process.
I personally do not find the right-hand folder panel in Version 4, with its icon views (even of the folder contents!) at all useful, since I load up my image queue from a directory list following Ctrl-O rather than by dragging from the right hand panel.
Is there some way to specify in preferences that the right hand panel and its background processes be disabled?
Thanks