Cabal install broken with GHC 6.10.1.* HEAD

Hi, I've just installed GHC 6.10.1.20090225 which has set base as 3.0.3.0, instead of the 3.0.2.0 which GHC 6.10.1 had (I think). This causes cabal install to break, as it implicitly adds base == 3.0.2.0 which nothing has so nothing installs. Could a new version of cabal install be released that fixes this? I'm totally hooked on cabal install and now having upgraded GHC I've lost it. The likely result is that I'll have to downgrade my GHC because cabal is just too useful! Thanks Neil