I also installed the updated and used Google Voice without any issues.. may be you should pull the battery and wait for 2- 5 mins, put it back in, let the phon reboot, and then try updating again.
For Liberty 1.5 users uninstall it with root explorer in /system and then reboot. You should now be able to install the updated version .
DO NOT use Titanium Backup to uninstall the app you will get an error and will not be able to install the update along with problems using sms.
I nandroid restored back to stock blur and was able to install the update with no issues so as far as I can tell it's a problem with Liberty 1.5 that can be worked around witht he above recommendation. I cannot speak for other custom roms.
Has anyone else noticed annoying issues with the last two updates. Notifications don't go away and the widget keeps loosing pictures. Also just doesn't seem as stable as 4.2.8 to me.