In the last months my desktop freezed sometimes (once or twice a day). I ran my system with CSSU and 805 Mhz. Anything I tried, did not help. The freezing occured mostly, when the N900 started to do something like updating OMWeather or receiving Emails. The freezing got stronger after installing CSSU-Thumb. Then the desktop freezed every hour at least. Now, the freezing is over. I removed MaxCPU and SaveCPU from my N900 some days ago. Since I did this, there was not one single desktop freezing.