Time update rendering is a bit of a performance issue at the moment. Updating the entire progress bar takes so much time that it affects the performance of the scrolling. Thus it's done only in idle states for now. I'll try to improve the situation in the future though.

Jaffas and Saturns report:
If you've only got four or five albums, only three are completely visible, the previous two can only just be seen off the left of the screen.

Has just been fixed to the code, so it'll be fixed for the next version.

Play/pause button problem is something that I'll try to remember when I modify the icons to be more button like.