Thank you for your reply.
I was trying to install pitivi from Karmic's universe repository (version
0.13.1.2).
Anyway, I just tried again and the problem is gone, so I will close this bug.
** Changed in: pitivi (Ubuntu)
Status: New => Fix Released
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Installation fails - depends on packa
There's not pitivi release that depends on gnonlin >=0.10.11.2 .
You're either trying to install a pre-release (in which case you should
be using the gstreamer-developers PPA), or ... well you're on your own.
If you got this package... where did you get it from ?
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Installation fails - depends