FaceTime issues, how do I troubleshoot it?

[Bheleu]

I get a black screen anytime I try to launch FaceTime and uncertain why or how to fix it, appreciate any help or advise to fixing it. Do I uninstall until I find the culprit, restore and slowly install or wait for App updates? First time JB'er. Thank you for any help, it is greatly appreciated.
Here are my installed Cydia Apps:
Activator
BigBoss Icon Set
CardSwitcher
Cydia Installer
Cydia Translations
Mobile Substrate
MyWi 5
MyWi 5.5 (iOS 5 Library)
MyWi OnDemand
PandoraSkips
Quasar
Rocky Racoon 5.1.1 Untether
Substrate Safe Mode
TetherMe
WiFi Analyzer
3G Unrestrictor 5 - Uninstalled, tried FT, reinstalled

 

[Bheleu]

Quasar

Uninstalled Cardswitcher, FT still did not work...
Uninstalled Quasar and FT was back... Going to let dev know.

 

[Sylon]

Uninstalled Cardswitcher, FT still did not work...
Uninstalled Quasar and FT was back... Going to let dev know.

Its mentioned a few times in the Quasar thread that Facetime doesn't work with it.