I decided to run Iagno from terminal and get errors related to few stylesheets:
(iagno:17841): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:85:17: Not using units is deprecated. Assuming 'px'.
Same for nautilus.css, nemo.css, unity.css, epiphany.css
How to resolve this trouble? (and occasionally Iagno lockups)
Sometimes program locks interface and uses almost 100% CPU to resolving next pass.
and also sadly wrong in algebra, i'm sorry