I am not sure if they are bugs but they seem weird to me.
1. Number of cards to review do not seem to be the same in all devices. My iPhone said I have 156 and the iPad said 141, the web said 157. Sometimes the differences are quite large like 3 and 300
2.Sometimes the pronunciation does not work and I have to restart the app to get it to work again. The speaker icon turns orange when this happens. This is different form when Skritter does not have pronunciation for the word and the icon got a cross on it. I still trying to find a way to reproduce this. It happened twice now.
3.This evening when I go to forum from the app, it show me the web version of the forum instead of the apps one which make text really large and difficult to read. This is also the same when I follow the link mentioned in the forum.