I´ve been running a multisite blog on this infrastraucture:
- Windows Server 2003 SP2
- PHP Version 5.2.5
- WordPress 3.2.1
Today I want to upload a new plugin, but I don´t have the possibility to click on add plugin, because this function isn´t here. But I´ve found a workaround for uploading plugins: Go to Tools => Import => search the plugins directory. In the past there´s a superadmin site and now I don´t find this again.
I also run a normal (single site) blog at the same machine and at this blog I´m able to see the function "add plugins", so in my opinion it is definitly a multisite problem.
Thanks in advance.