The chance for this build to leak is very small. I think we will have Beta earlier than possible leak of this build.
Hm, I tried zuko.bonus 9.1 yesterday and my WMP got screwed (an (for me) unsolvable problem with wmploc.dll occured) and after some unsuccessfully attempts I'd decided to reinstall windows. So, watch out, what you are installing.
This is because update that screws with WMP (only on x64), was removed from there however it was "reintroduced" today, since zukona gave us "fixed" version of the update And ye SP1 beta is pure garbage, if you are keeping in touch with updates. Since you are basicaly "months behind". Hotfix does not get in to SP beta until is extensivly tested and this takes couple (~2) of months. I will personly started to use SP1 beta, when ill knew that MS started to make hotfixes for SP2. At that point we will know there wont be any more "new" hotfixes for SP1.
I don't understand complaining about falling WMP. There's a new version of update in ZukoBonus 9.2 that fixes it.