interresting to see this thread going on,
i have also been using Iron since it started, never had any probs with it,
but i think since version 19.x.x i am having issues too,
my laptop after a while of using Iron becomes nearly frozen, and i need to kill the Iron processes, after which it returns back to normal.
Also the harddisk light starts blinking (reading/writing?) nonstop as soon as i open Iron and start to browse the web.
I upgraded to latest version Iron, but the problem is still there.
I have this only when Iron is opened.
As i am posting this now from Firefox (which i totally dont like!)