Dropian still works though. Not as good as being able to share directly from the gallery but better than nothing.
CuteBox shows a message from Dropbox saying "Version 0 of the Dropbox core APIs is no longer supported" and gives a URL to a page giving migration help for developers.
Filesink just sits there with a wait cursor spinning.
So there are alternatives, just not for sharing directly from the gallery.
Is this an unexpected change by Dropbox? My Linux boxes all work still with Dropbox as does my work Win7 box.