i3 and openbox freeze on right-click in terminator window

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http://crunchbang.org – No problems with upgrades but the problem persists.The problem is also reproducible in openbox so this is not an i3-specific issue. In openbox, the dropshadow around the menu draws but the menu itself never draws.I tried purging terminator and reinstalling but the problem still persists. This suggests to me that it is something to do with the contents of the menu but I'm getting outside my areas of knowledge... (HowTos)