So my imac running 10.6.3 has developed a bit of a problem. when a launch certain apps, the icon just bounces and the app never launches. I end up having to force quite and restart to get the app to work. Other apps freeze up (sarfari and chrome) and I have force quit and restart. then there is VLC which launches plays media then freezes. All of these are solved by restarts. Seems if i let the machine fall asleep, then all these bugs resurface. My first solution was to create a new user and delete the old one as my "backup" username seemed to work fine. this did indeed solve many of my problems but now different apps have developed bugs. Should i just reinstall the OS?