3.3 plugins - only network activate!

Hi there,

I'm completley stuck on this.
I have an MU site, which has one additional blog.

I recently upgraded to 3.3 but seem now to have lost the ability to install plugins on the individual blogs - even the main one. I only have the ability to install and network activate via the new network dashboard.

I'm really stuck - I hope this is a simple 'tick box' that I donlt know about and someone can help me out pretty quickly.

Any ideas???

Many thanks