This may be a problem specific to Reddit.com, but I find that if I follow a link to another site on mobile safari and hit back, that only part of the time will I see the latest copy of the page. A lot of times, I'll see a copy of the page from weeks ago that mobile Safari has cached for some reason.
For clarity this is what happens:
- I visit reddit on March 1st in mobile Safari, click some links, everything works.
- Later I visit reddit on March 3rd and I see the March 3rd homepage.
- I click a link to visit another site off of reddit, and then click back to go back to reddit.com
- I see the March 1st copy of reddit.com