overclocking will increase scrolling and responsiveness and everything else.

it is at your own risk.

im overclocking for about 4 months and i dont see any bad effects.

using too low voltages will NORMALLY cause abnormalities like a non-functioning camera.

i use ideal settings, and when my activities with the n900 gets tough, i overclock from 850mhz to 1150mhz, ideal settings.

even at stock, the app manager uses 100% CPU because its populating all apps installed and cached repos.....so in theory, the more repos and apps you enabled/installed, the slower the app manager and less responsive the device is.

i use x-term in installing and uninstalling, this helps reduce the burden.