For smartphones as well, update is recommended. I have just updated my 5800 XM and kinetic scrolling in browser is lot smother and faster. Page rendering is faster as well than previous version.
It's just rubbish, pages are regularly malformed, stops you entering text on web forums, utterly hopeless, a bit like Nokia/Symbian phones.
This one is very good, I like many things in it.
hope it can run faster