Would be possible to have an upgrade to 7.0.28 that is the current stable version?
This would fix the "menu bar not displayed" problem and also fix the partial recognition of cpu flags.
Yes, there is a boinc 7 scratch build in Koji, I will release an update soon. Note that the "menu bar not displayed" issue was not fixed in the 7 branch, but I have backported the patch.
boinc-client-7.0.29-1.r25790svn.fc17 has been submitted as an update for Fedora 17.
boinc-client-7.0.29-1.r25790svn.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.