It appears to be a day later now though, and it still hasn't updated on the BGG Homepage. I just had the same experience as the OP a few minutes ago.
And it is still there this morning too. That seems to me like an overly long time to rely on cached data for a heavily used forum. Especially given how many new users we get that post things in the wrong places. Then again, I don't really know how often BGG refreshes these caches (for all I know it could be later today).
How often is the homepage cache supposed to update?