Image instant uploading isn't working

Ever since I upgraded my Google+ app on Friday (3.3.0.40049528) one of my favorite features, Image Instant Upload, is not working. One of the big changes in [this release](http://gplusproject.appspot.com/tis-the-season-for-shipping) was that instant upload could now upload full size images, rather than limiting them to 2048px. * I have plenty of available storage (4GB out of 5GB available) * I have force stopped the Google+ app as well as cleared the data at least once * The phone (Verizon Galaxy Nexus) has been restarted a couple of times * I am using the stock camera app for my testing * The settings were not changed when I updated Google+, but I have confirmed that Instant Upload is set to allow photo uploads on wifi as well as mobile data. I do not have "upload only when charging" turned on, and there is plenty of battery available. Any ideas? Have I got a bug that needs an update?