Regarding the DCS-930L firmware update, thanks D-Link, the new time delay between images should make the camera much better behaved when there's a lot of motion.
It did take 2 tries for me to get this update applied, though. The MyDlink app on my phone prompted me to update, and I also saw the announcement here, but I began from the link to updates in the camera's maintenance menu (firmware upgrade page) to download the new firmware. This took me to a support site http://support.dlink.com/, where I did a search on this camera, arriving at this page: http://support.dlink.com/ProductInfo.aspx?m=DCS-930L and downloaded firmware. I applied this, and only after doing this did I notice it was actually old firmware (1.08 the same as what I had previously, not the new 1.09). I then found the right (new) firmware from this forum. Can that support site be updated with this latest firmware too, so people don't get the old version like I did? mydlink.com also seems to have 1.09, but support.dlink.com has 1.08.