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 ass and making his loop work, but it's more likely a bug <img src="smileys/smiley2.gif" border="0" align="middle">