Having had the privilege to use the Summit N900 for almost a month now, I'd like to discuss how to handle "Out of memory" errors and UI freezes that sometimes occur on the N900. (extras-testing enabled and apps in use). From time to time, the device gives "out of memory errors". Sometimes the message can be ignored, other times the battery has to be removed. I have been assuming apps from extras-testing is the primary cause. How to optimally troubleshoot this? The crash reporter is useful for crashes, but not for UI freezes. How does one trace the origins of temporary (say, 5-10 sec) or permanent UI freezes (where a reboot is necessary)? How to find out whether this is simply a result of memory shortage, that would/should not happen without apps from extras-testing? UI freezes are also hard to bug report, like this one. And what to do when cpu usage generally is high without any obvious reason, or when the OS gets sluggish?