I use Firefox ID, been doing that for years on WC for me though, IE, FF, no difference. A lot of times I will post, look for the post and it is not there at all. So I leave it alone for several minutes and it appears. I imagine this is the reason for some of the double posts that occur on the site... people don't see their post and assume it did not take and post again.
I guess I should clarify what I said though, these things do not happen all the time, but they do happen a lot. Many times too I will have people say they posted a comment or a reply in a thread and I go to look, and it's not there. Even clearing my cache does not help. But again I wait 4-5 minutes and it appears. Just weird is all. 
Uploads not showing up immediately I understand, but is there a delay for an item to show up on the front page that is intentional? Takes anything I upload, which do not go through moderation, about 4-5 minutes to show up.
