OTA update zip failed to flash for me because of a debuggered exception, I posted in the 4.4.3 thread and someone said it could be caused by Stickmount. I had the Stickmount app installed so that was the problem, uninstalling the app didn't help, so I just flashed the factory image and started from scratch.
Nexus 5 - 32GB Black - Unlocked & Rooted - TWRP
S4 - Black (Wifey's)
Galaxy Tab Pro 8.4
Galaxy Tab 10.1
RIP - OG EVO - Wife killed the power button
Amon_RA 2.3 | MikG 3.11
AnthraX Kernel (sometimes)