Thank you very much for the suggestions I have tried most but sadly just when it seems cured it happens again.
Using windows 7 with the latest Linden Browser, latency generally around the 150-160 mark no lost packets occuring. I log in fine am able to change clothes without issue.....sometime later I take off an item of clothing my top half becomes invisible...followed moment later by the rest of me leaving only my hair, teeth and a few other superficial items ^^ showing. Even if I replace my original outfit i remain visible, I relog I am still visible...unless I clear the cache - so it would seem something may be regualrly corrupting my cache perhaps???