I think I had some issues with the update on my 920.
After the phone was finished updating I got the screen saying that the update was complete. However, most of my apps are blacked out and say 'installing'. They are all progressing quite slowly.
When I go to the phone update section it says 'The update couldn't be completed. (80070098). When I check the OS version it does indicate that it was updated and shows 8.10.12393.890.
The boot screen still shows the Blue windows logo on my phone as well.
When the phone finishes loading after a power on or a reset, the speaker makes a clicking sound even if the volume is all the way down.