Description of problem:
I had just installed the Fritzing package (fritzing.i686 0.7.5b-2.fc18 as displayed) using yum, on a fresh install of Fedora 18, from the Fedora repo. 
When I try to add any component, or sometimes just click anywhere in the Fritzing window, it crashes.

I had the same problem with Fritzing in Fedora 17.

To reproduce:
1. Fresh install Fedora 18 
2. Update system
3. Install Fritzing
4. Run Fritzing and try to add any component

P.S. Fritzing 0.7.10b downloaded from the project's web page works ok.

Version-Release number of selected component:
fritzing-0.7.5b-2.fc18

Additional info:
backtrace_rating: 4
cmdline:        Fritzing
crash_function: QMetaObject::activate
executable:     /usr/bin/Fritzing
kernel:         3.7.2-201.fc18.i686.PAE
remote_result:  NOTFOUND
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 QMetaObject::activate at kernel/qobject.cpp:3441
 #1 QStatusBar::messageChanged at .moc/release-shared/moc_qstatusbar.cpp:145
 #2 QStatusBar::hideOrShow at widgets/qstatusbar.cpp:696
 #3 QStatusBar::showMessage at widgets/qstatusbar.cpp:616
 #4 message at widgets/qstatusbar.h:88
 #5 qt_static_metacall at .moc/release-shared/moc_qstatusbar.cpp:67
 #6 QStatusBar::qt_static_metacall at .moc/release-shared/moc_qstatusbar.cpp:57
 #7 QMetaObject::activate at kernel/qobject.cpp:3539
 #8 QStatusBar::messageChanged at .moc/release-shared/moc_qstatusbar.cpp:145
 #9 QStatusBar::hideOrShow at widgets/qstatusbar.cpp:696