DAVID DUNHAM  This works under Snow Leopard (10.6), and also with a small wired keyboard (i.e. you don't need a MacBook). I only use it to remap the Enter key to where my muscle memory knows it is, but I'd be cursing Apple without it.  
(Version 5.1)

DAVID DUNHAM  Thanks, I set that up on our server. I couldn't reproduce the bug though, so I don't know if it fixes things.  
(Version 1.2)

DAVID DUNHAM  This is covered in our FAQ . Rename the file to ".dmg".

Since we only post .dmg files, I would love to know who is changing them to .dmg.bz2 -- I always test both download links before going public, and they always work for me.  
(Version 1.2)

DAVID DUNHAM  Also, I just reconfigured our server. One user who reported the ".bz" issue says it now works like it does for most people.  
(Version 1.0.4)

DAVID DUNHAM  Please use our support system -- we can give you much faster support.

I think the answer may be in our FAQ. Chances are the .dmg file somehow got named .dmg.bz2. If so, just remove the ".bz2" portion of the extension and try again.

If neither that nor the other possibilities in the FAQ help, contact us (bugz _at_ a-sharp _dot_ com).  
(Version 1.0.2)