I've upgraded a G4 dual 450 from 10.3.9 to 10.4.11 and now the cd drawer opens every time I boot. I _know_ I heard of this problem when 10.4 was released, and I wrote down the solution 'just in case', but now I can't find it.

My search-fu isn't up to snuff or this problem hasn't been discussed previously here. Does anyone remember what the problem is, and how to solve?