Safari won't start properly - update related??

Suddenly , when I open Safari, it doesn't start properly - I just get the spinning wheel icon and I cannot browse websites. ( Luckily, I have Chrome which is working.

I don't know if it was related the recent Delta os update so I downloaded the 'Combo' update and applied it but still Safari won't work.

I don't fancy the re-installation of Lion just to get Safari working but if there's something less drastic, perhaps someone can suggest something.

Thx in advance.

-d-