Dexter... i did a full wipe and still had the su issue. I installed version 1.0 and added the superuser application from the market and it works perfectly. I dunno, but seeing this device never needed su out of the box maybe something with the way you added it to the rom in 1.0a.
Nisshi - imo you're better off running version 1.0 whereas even after modifying build.prop on the official build it still couldn't download all my apps. 1.0 seems perfect. I'll look for the link for you.