The problem is related to sip's API. Downgrade to the package below make GNS3 run as expected: python-qt4-common_4.4.2-4_all.deb python-qt4_4.4.2-4_i386.deb sip4_4.7.6-1_i386.deb python-sip4_4.7.6-1_i386.deb
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