Please update pydev to latest upstream version. Due to mylyn restructure upstream pydev mylyn integration will have to be restructured.
Sami, please take care of this one.
eclipse-pydev-2.5.0-1.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/eclipse-pydev-2.5.0-1.fc17
Package eclipse-pydev-2.5.0-1.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing eclipse-pydev-2.5.0-1.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-6802/eclipse-pydev-2.5.0-1.fc17 then log in and leave karma (feedback).
eclipse-pydev-2.5.0-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.