I have had a couple of reports of this. I wrote it off as caching and I told them that it sometimes could take a few minutes because of the forum caching. I also noticed in my CP that I'm serving almost 40% of my views from the Accelerator. I was getting reports of this happening after Upgrading to 6.2, and enabled the Accelerator.
There is another site which uses UBB which some members reported the same behavior (This site serves almost 15,000 views/day from a Win2k box) and they are running 6.1.0.2 with the accelerator.
