When trying to Install b5 this morning I recieved the following error:

Clicking OK appears to have allowed the install to continue unhampered. I'm currently at the "preparing your library" stage.
System Specs
* Desktop | AMD X64 3800+ (2.0Ghz) dual core | 4GB RAM | Dual 22" widescreen monitors at 1680x1050 | Nvidia 7300 GS 256MB video RAM |500 GB Raid Mirror. | Windows 7 64bit RC 7100 - all patches.