I'm having the same troubles as described here; I'm wondering if there was any resolution? A few things that I've noticed are
- The delay seems worse if the network folder has a large number of images (100+) but this could be an illusion.
- The delay is worse on slower network (which seems obvious). I.e., 802.11g vs. 1000BaseT copper.
- Happens on both the Windows and Mac side for me. Spinning ball or hourglass.
- It only seems to happen on switching focus of the contact sheet.
- The first time the folder is open, it opens fast and gets image previews quickly (for reading from the network albeit)
I haven't timed anything, but the delay is unbearable to work with images from a network drive.
I'm using PM 4.4.3.3 on a Quad MacPro and MacBook Pro and PM 4.5 with Bootcamp running WinXP.
I haven't had much need to adjust preferences except to up the cache settings a little (512mb disk/256mb memory).
--Aaron