*** This bug is a duplicate of bug 1578430 ***
https://bugs.launchpad.net/bugs/1578430
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1578430, so it is being marked as such. Please
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: qt4-x11 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1627511
This shows an upgrade failure in the libqtcore4 package, not in skype.
** Package changed: skype (Ubuntu) => qt4-x11 (Ubuntu)
** Changed in: qt4-x11 (Ubuntu)
Status: Incomplete => New
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The error seems to be caused by the last installation candidate (skype-
bin), i386-package on 64-Bit installation.
** Package changed: qt4-x11 (Ubuntu) => skype (Ubuntu)
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Bugs against SKYPE should be reported against their bugbase.
Ubuntu can't do anything about this, as it is proprietrary third-party-
software.
Reading from the logs that the installation language is german I would
highly recommend for you to seek help at the german ubuntuusers-forum
[1].