Issues with Kicker (hidding, configuration-dialog), nightly builds of R14

Good evening! i have some issues with Kicker using nightly snapshots of R14, i'm not able to hide a panel on every screen; hidding the horizontal panel works only on the 3rd one. I'm using the NVIDIA drivers 331.38 on Debian Wheezy (AMD64). I created another panel, the configuration-dialog shows that the hide-button should be visible on the top of the panel, but there is no button. One panel is horizontally, the other vertically aligned. Does anyone else have related problems with Kicker? With kind regards, LJ