I do use the F5 button on IE but that doesn't seem to refresh the "Recent Posts" and other tabs on the left hand side
The recent posts region is a static component built by a backgroup php process on the server (as are the Top Posters, Forum Stats, Birthdays, Newest Members and the Recent Vacancies regions).
All of these are pre-determined refresh periods, ranging from Daily (for the birthdays one) to every 10 minutes.
I could decrease the refresh time on the recent posts to (say) 1 minute but i think the current site traffic does not warrant it. Everytime one of these page regions is rebuilt it requires a background process to run - if one of these was running too frequently it would eat up valuable processing resource and slow everything else down.
That said - i am hoping things will improve when i move it all over to the new hosts, but this is unlikely to happen until easter as i need a couple of days to do it.