I downloaded the latest nightly build (2568) and found the new tab feature. It looks promising. However, I really like the way MySQL Query Browser creates new script/query tabs sharing the same session (http://cl.ly/4c353b77cac746d51698). It's more convenient to have multiple query tabs that can be quickly created, switched to or closed down, then having to create a new connection every time for a new tab.
PS: also the shortcuts to switch between tabs weren't working for me.
PS: also the shortcuts to switch between tabs weren't working for me.