I have MacBook Pro running Vista Ultimate.
Only after upgrading Firefox 2 to 3 I got a serious problem with extremely high CPU (100%) and a memory over 568,000 usage.
After long time use it leads Vista to reboot itself showing the system error message (on a blue screen) that the OS is going to restart to avoid the demage to PC.
Additional problem with it is when I closed Firefox and checked a windows task manager I found Firefox is still runnig there as it was activily used - the same 100% of CPU and over 566K memory usage. I was waiting for about 5 minutes and the picture has not been changed.
When I run Firefox again I have got an error that Firefox is still running in the memory and that it should be closed prior to running another instanse.
Thanks for any advice.