Here is the example:
http://dl.dropbox.com/u/73352718/whileloopbug.capx
The while loop that relies on the Jesus' opacity directly works just fine and he fades in as expected.
The while loop that relies on a local variable to do the same job fails to iterate even once, and the Krull Blade stays hidden.
I'm tempted to say that it's Jesus just kicking *** and making his loop work, but it's more likely a bug <img src="smileys/smiley2.gif" border="0" align="middle">