What composite manager are you starting for the transparency for the lxpanel and are you starting that automatically? Lubuntu does not ship with a composite manager by defualt so you have to add your own.
** Package changed: lubuntu-software-center (Ubuntu) => lxpanel (Ubuntu) ** Changed in: lxpanel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1286812 Title: Lubuntu 14.04 Trusty Tahr Lxpanel Display Bug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxpanel/+bug/1286812/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs