I just upgraded my macbook pro to Yosemite 10.10.1 and not I cannot even start Thunderbird without it crashing....I even deleted the application and downloaded the latests. I'm fearful of deleting my profile and am not that technical. Now I cannot get into some of my email. Thanks in advance for someone who can try and help me. Here is my crash report. AdapterDeviceID: 0x d26 AdapterVendorID: 0x8086 BuildID: 20141127140543 CrashTime: 1419712462 FramePoisonBase: 7ffffffff0dea000 FramePoisonSize: 4096 InstallTime: 1419708999 Notes: AdapterVendorID: 0x8086, AdapterDeviceID: 0x d26GL Layers! GL Context? GL Context+ GL Layers+ ProductID: {3550f703-e582-4d05-9a08-453d09bdfdc6} ProductName: Thunderbird ReleaseChannel: release SecondsSinceLastCrash: 4 StartupTime: 1419712462 Throttleable: 1 Vendor: Version: 31.3.0 This report also contains technical information about the state of the application when it crashed.