Another, more serious issue i encountered is movie playback with the mplayer backend, which is mandatory for presentation purposes due to stability and consistency. When playing back widescreen AVI-media, i get a wrong aspect ratio, the width is being forced to fit screen, while KMplayer plays them fine. When using Gstreamer and MAFW, the aspect ratio is correct, but i get hiccups due to occasional high bitrates, so this not an option.

The lecture is few weeks ahead, maybe you could include a fix in the upcoming build(s)?