Hi!
Recent versions of Mypaint (as of 0.6.0 i believe) requires python-numpy and a pygtk built with --enable-numpy. I've tried to build those packages but failed (pygtk and python in Diablo/Maemo are a mess...)

Jonathans patch above does not eliminate the ghost lines for me with the default brush set (I get dotted lines).
- As I have said earlier in this thread you have to adjust the pressure settings for each brush to get rid of them...
For those who don't believe me there is a .deb with Jonathans changes here.

Right now Mer is shaping up (there were pressure related issues due to xorg, but the transition to back Xomap made things slightly better ). For those who has Mer 0.15 installed there is a easy way to try it out.

As for Fremantle - I feel this is a kind of application that is hard to port and try out without a real Maemo 5 device in my hands...