I just completed manual update for both of my my devices Nexus S and Galaxy Nexus. However both after update suffered Google Play Store not able to update giving timeout Error.
Google Play Store error could be fixed with wiping of cache & Dalvic
1) Galaxy Nexus
Install full ROM of yakyu 4.0.4 with manual steps (unlock bootloader, fastboot to flash in bootloader, radio, system.img, userdata.img, recovery.img...)
Market recovered after master reset from Menu/Backup&Reset
=> This will do cache & Dalvic wipe
2) Nexus S
Update with CWM..
Market recovered after dalvic & cache wipe
Have fun..