If you download a behaviour from StencylForge and try to use it Stencyl 4.0.2 (b10468) when you open the behaviour there are no blocks of code showing, also if you check the Preview Code tab, there is no code beside the default .
Importing behaviour in Stencyl 4.0 .1 b10300 works perfectly
Importing behaviour in Stencyl 4.0 .1 b10300 works perfectly