There is one solution given: "You can either downgrade the package via Synaptic: Select libwebkit-1.0-1 and go to Package | Force Version.... Select the version from either intrepid-updates or intrepid (depending on which repositories you have enabled)."
I have done that and restarted Gwibber - and everything was fine.
I upgraded to Intrepid on my notebook - but the error was the same.
But I found out, that it seems to be the same problem as mentioned here: https:/ /bugs.launchpad .net/gwibber/ +bug/304033
There is one solution given: "You can either downgrade the package via Synaptic: Select libwebkit-1.0-1 and go to Package | Force Version.... Select the version from either intrepid-updates or intrepid (depending on which repositories you have enabled)."
I have done that and restarted Gwibber - and everything was fine.
Greetings,
Andreas