Delay between hackage upload and cabal-install seeing package

[Ross Paterson]

On Thu, May 14, 2009 at 10:52:36AM +0100, Alistair Bayley wrote:
> I've uploaded Takusen-0.8.5 to hackage, and it's visible at
>   http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Takusen
> 
> but "cabal install Takusen" still tries to get 0.8.4. Is there a
> separate database/file for cabal install which is rebuilt
> periodically, and it so, how often? i.e. how long is the delay between
> upload and being able to test cabal-install?

The database is

http://hackage.haskell.org/packages/archive/00-index.tar.gz

It's updated before the upload returns, and indeed Takusen-0.8.5 is in there.
A web caching glitch?