I just downloaded the latest again this morning.  The timestamp on the .js files in the .zip file is 06/18/2008 11:10 PM.

 

This issue is NOT fixed in FireFox. 

 

Again, I'm using the sample provided in your install.  It occurs only in FireFix, when the virtual folder has a space in the name.  The test you performed and screen captured should be fine to test - if you use FireFox.  (I've not updated to FireFox 3 yet)