Sent from my Nexus S 4G using xda app-developers app
For the message "system process not responding", it is caused by gapps (googlebackuptransport.apk more exactly). We will update them for next release. If you need a workaround, try to change googlebackuptransport.apk in /system/app/ from another recent gapps . Anyway, that message doesn't affect anything in daily use.
For OTA app, update notifications can be effectively disabled (except at boot) in next release
I am on the stock kernel. I used my phone a lot these days and I have at least a dozen of extra apps installed. No slowdowns.
It may be an old app which wasn't updated by its developer. Many things changes in AOSP sources. Try to fix permissions in recovery or delete some apps. Check also the list of running apps in background
|slim bean crespo 4.2.1 tchaari|