The Safari 4 beta has been posted on Apple for awhile and there are people talking about it on the interwebs. So my turn. But rather than wax poetically about browser wars, which seems to be what everyone else is doing, I’ll constrain the conversation to the Safari 4 beta, which you can download from here. If you haven’t moved into tabbed browsing yet, then after you install the upgrade you’re likely not going to notice much of a change. When you open Safari it will look a little like it always looked, with some minor enhancements to the GUI – notably the little picture of a bug in the…