Resize firefox windows black line

[p3p1]

First of all thank you for this bundle of utils. My current configuration is XFCE+Openbox. I have problem related to resize if I try to resize somqe applications, e.g. Firefox or Thunar, the side where I want apply the resize appear a black line? Where is problem?

[z3bra]

wmutils can't play well with reparenting window managers like openbox. Because they create windows for the border, and make the applications sit within these windows. This is a design wmutils can't handle, as it's meant to act on windows directly. Also, openbox is EWMH compliant, which means it will expect application to send EWMH request to change windows attributes, which wmutils won't do. If you want a way to hack around openbox, you should give [wmctrl](http://www.freedesktop.org/wiki/Software/wmctrl/) a go. It basically works like wmutils, but it will send EWMH request to an already running WM, rather than acting on the windows itself.