I'm using the git version on arch64. In xinitrc i have pcmanfm --desktop&
Now whenever I open a pcmanfm window it is automatically set to fullscreen also covering lxpanel. It can't be resized. In ~/.config/pcmanfm/default/pcmanfm.conf under [ui] the size is allways fixed at 1280x800 (my resolution) and can't be changed.
Note: i don't use a window-decorator