Hi all, second try and now with some updates and tips
from here, this is the situation;

1 - Updated my Ambient from 26/02/07 to 11/03/07
2 - Installed apooler 1.0a

Results

The slow scrolling gone, the loading page speed get
a little beter, down from 54s load to a 46s load in
this site www.terra.com.br, so I can use sputnik now
and wait for the next beta.

Obs: A allmoust freezy situation in MOS can be done
opening sputnik prefs and then hit the cancel button
without changing anything.

Again thanks Marcik.