I've been having a problem myself the last few days. I use mainly Chrome but now when I edit a post and repost it, the edited version doesn't come up on my screen, yet when I exit the thread and go back in it's there. It happens with IE as well.
I've had that here for as long as I can remember. I believe it's a caching thing and is particularly noticeably when using quick edit.
I think the edit is showing for everyone else but might not show instantly for the person who's making it.