On the iPad, how do I tell what version of Mobile Safari I have? I'd like to know what precise version of Mobile Safari the iPad I'm using has. Is there any way to find out (preferably from the device itself)? There doesn't seem to be any menu in Safari Mobile, and thus none to choose "About" from. If you go to Settings | Safari, you see various useful things, but no "About" or "Version" or similar, which surprised me.
The only way I've found Ross McNab's way was much better but sadly no longer works (thanks, Apple); Billy Moon's way works but is a bit awkward for one-off checks.

Another way to do this is to use an external website (there are plenty to choose from, just search on "what's my browser"), which will report my user-agent string back to me.

So for instance, these sites will report back to me that my user-agent string is:

Mozilla/5.0 (iPad; U; CPU OS 4_3_5 like Mac OS X; en-gb) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5

...from which I can tell that I'm using Mobile Safari 5.0.2.