bombono dvd renders menus indefinitely

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http://unix.stackexchange.com – I'm trying to use bombono dvd authoring tool to create some DVDs. Unfortunately when I try to generate an image bombono gets to a point where it says 'rendering menu #3' and hangs there indefinitely. The whole app is responsive - so I can cancel the process, etc. What I would like is for it to finish, and write my ISO image to disk :) Is this some known issue with bombono? Should I change something in my DVD project? (HowTos)