Hi Kirk, yes the urgency field is synced.
I've been experimenting and trying different things
1. Took a new NEF file that hadn't been touched by an earlier version of 4.6.1 and using the stationary pad added a Caption and structured keywords, then edited in NX2, then saved as a JPG, then uploaded to Smugmug with the PM uploader - no keywords showed up in Smugmug but the Caption did show up in Smugmug
2. Took another new Nef from the same directory that hadn't been touched by an earlier version of 4.6.1 and this time I used the IPTC Info panel to add a Caption and structured keywords, then edited in NX2, then saved as a JPG, then uploaded to Smugmug with the PM uploader - no keywords showed up in Smugmug and no caption showed up
So it seems like something different is going on if I use the Stationary pad to tag vs. the IPTC Info panel, in both cases Smugmug didn't see the keywords, but if the Stationary pad was used it saw the Caption, while when the IPTC Info panel was used neither the Caption or keywords showed up in Smugmug.
3. For my next test, I took a NEF file that had the Captions and Keywords added with an earlier version of PM, edited in NX2, saved as a JPG and then uploaded to Smugmug with the PM uploader and the Caption and Keywords were both seen by Smugmug.