Problem with page refresh

Sometimes it happens to me that I get a blank page while browsing the forums and I have to manually refresh the page in order to continue.

This usually happens when I click on the Edit post button or (more rarely) when I change subsection.

Is anybody else experiencing the same issue?

PS: I’m using Safari on a Mac.

It doesn’t happen to me. Every once in a while the forum is a bit slow, but white pages, never.
I use FF on Windows XP or Windows 7.