I am using windows XP with 1 GB RAM with Firefox 8.0. I am having intermittent problems when adding a contact in Yahoo webmail. The problem doesn't happen all the time, but when it does Firefox memory usage goes up to 600 MB -900 MB of memory usage and I get a script error that pops up. I can go into processes and kill the process, re-open Firefox and it will be fine for a little while. The only time this happens is when I try to add a contact in Yahoo. I have screen shots of the script errors in Yahoo if you need them.