I have a 2009 UniBody MBP. Quite often Macrumours stops working on my MBP and when I try to go onto the forum it won't connect (only the forum won't connect). If I restart my machine it works for about 10-15 mins then it won't connect till I restart again. I'm using the latest version of firefox on SL. I have tried resetting Firefox, emptying the cache, I've tried it on Safari as well but with the same result. Does anyone know what could be wrong and how I could fix it?