My computer and graphic card are both up to date. The only way for me to get into SL has been to uninstall viewer 2 completely and use Phoenix. People having more than one viewers on their comps have also had problems after the latest updates in viewer 2. It seems to disturb voice and other stuff on other viewers too. So if you can't update you graphics but still want to be in SL then I would recommend unistalling viewer 2 and only using some other viewer.
This is really a pity since I was very comfortable with the new viewer. I hope the problem can be fixed though and i can get back to using viewer 2.