make sure you're using chdk release 1.2, some issues have been reported with the older versionIf you know of bugs which exist in the stable branch but not the trunk, please point them out specifically. Telling to people to just use the unstable is not a helpful solution.
which brings the question: being chdk an hack, why keep "stable" release branches?
Bugs of this sort should be fixed in the stable branch.
edit: I should add that trying the trunk to see if the bug exists there is certainly a reasonable approach.
Note zebra is not normally intended to operate in video mode. It certainly won't work on old cameras that use a different live view layout in video mode. It would be nice if it *did* work in video mode, but that's another story...
I don't know if there are bugs or some missing function/define (from the posted video it looks like the aspect ratio is messed up somehow), but this already came up in the g15 thread http://chdk.setepontos.com/index.php?topic=9257.msg100207#msg100207
and switching to trunk worked (not to mention the fact that the development and testing was done against trunk so for someone willing to use chdk on his g15 I don't know about a better solution than that...ofc developers/hackers might choose a different path)