[Mono-list] corlib out of sync

[Paddy Joy]

Hi,

Sorry for such a basic question!

I have installed mono, mcs and gtk-sharp from svn. Everything seems to 
be working ok however when I try to build mono-tools I get the following 
error:

Corlib not in sync with this runtime: expected corlib version 48, found 47.
Download a newer corlib or a newer runtime at http://www.go-mono.com/daily

I presume this means I have some old stuff lingering around from a 
previous build? Do I need to remove something from my system?

Thanks,
Paddy