Fascinating. Similarly to Indiepath's web loader efforts, this refuses to run on my machine --> Windows XPSP2, GeForce 6600 v71.89... The B3D demo (castle) crashes in much the same way. The B3D window opens, shows a MAV dialog and quits after I click OK.
The real strangeness is with the B+ ones. First I let the InfoBar know it's OK to install the ActiveX component, then I click Yes to run the actual game. After that, the 'thanks for waiting' loading bar works, after that though... kaboom! ALL of my currently opened applications turn orange in my taskbar, indicating that the window has changed and needs my attention:

The Internet Explorer window shows in the taskbar that it is still loading the game (although nothing ever happens) and the little flag in the top right hand corner is still animating. I can't quit out. This also had the affect of freezing other IE windows and even 'Microsoft Office Picture Manager' (part of Office 2003). After forcing a program close using Taskman, all resumed normally.
The real strangeness is with the B+ ones. First I let the InfoBar know it's OK to install the ActiveX component, then I click Yes to run the actual game. After that, the 'thanks for waiting' loading bar works, after that though... kaboom! ALL of my currently opened applications turn orange in my taskbar, indicating that the window has changed and needs my attention:

The Internet Explorer window shows in the taskbar that it is still loading the game (although nothing ever happens) and the little flag in the top right hand corner is still animating. I can't quit out. This also had the affect of freezing other IE windows and even 'Microsoft Office Picture Manager' (part of Office 2003). After forcing a program close using Taskman, all resumed normally.