shiira is my primary, too. i downloaded 1.2.1 yesterday and the login authentication thing doenst work properly (apparently not just for me, logging into cpanel/phpmyadmin is a no-go for me!) so i dropped back to 1.2 and all is well. hopefully they'll get the "keychain" thing sorted for the next release as that's the only thing that holds it back for me.
also, on forums, i view at around 40-80 ppp and it sometimes stops responding for a short while after i load the page, again, this is a negligable bug as it's smoother, faster and generally nicer to use than any of the other browsers.