Oblivion trees are all the same

[morcroft]

It didn't really occur to me until I started making my own speedtrees but every tree of each type is the same. The game engine is supposed to use the speedtree seed values from the cs to randomise the trees you see but it doesn't seem to work. I assumed I'd messed up my .ini file somewhere along the line so I've just done a full re-install, but no change.

Anybody come across this? Any ideas?