Hey guys, I'm having trouble pinpointing why my browsers and itunes all crash at random intervals. I've used safari, firefox and chrome and they all crash so often. e.g. I click on firefox it launches and crashes. Doesn't go away until I try again perhaps 30 mins later. My chrome individual tabs have been crashing as well. I did a complete reinstallation twice with snow leopard / lion but neither fresh start works. Often the crashes will occur more frequently with time. All my symptoms fit perfectly with bad ram. However I cannot prove bad ram because I pass both the memtest86 and apple hardware test extended loop more than 3 times for each. I'm lost between deciding if there's a memory failure or logic board failure. What do you guys think?