Hi, I've had my macbook for about a year but ever since the most recent osx combined update, applications on my macbook crash continually. Safari maybe once every 5 minutes, Firefox less so. The more demanding the program, the more frequent the crashes become. Mac os itself actually crashes fairly often too. I'm running Mac OS X 10.5.8. I upgraded both my ram and hard drive personally when I got my laptop, but i've never had problems before the update and both sets of hardware were compatible. (i forget the technical spec). Could someone help?