I installed feedreader on 2 machines. The latest version 3.13 has a malfunctioning alerting windows:
When a new alert window shows up, it is fading in very slowly (15 seconds to show up) and than it tries to fade out, and get stuck in the middle. I.e the window faded out half way (it's 50% opacity) and it stays like this on the screen until I hit the X (close) button.
This of course is very annoying, since all other alerts seem to wait until the window is closed.