difficulty launching ichat with recent macbook air upgrade
I recently (yesterday) upgraded my mac book air to OS X v 10.9.3. I logged on this morning and was able to use iChat successfully. After about 2 hours, the application was unresponsive. I had to force quit and attempted to reopen it several times, always finding it unresponsive, requiring a force quit. After several failed attempts I shut down the machine and rebooted...again unresponsive. I did this at least 6 times to no avail. I've tried this from a number of sources (dock, finder/apps, launch, etc...) all with the same results.Any suggestions? The closest I've gotten is the spinning beach ball but the application never opens.