Invisible Web Graphic?

[Lawuy Cuff]

I am attaching a file that is driving me nuts (it was a short drive). I made the file to upload here. Here's what's happening:

• "The Thinker" is visible in the Xara file, but when I preview as a web page, it can't be seen.
• It also doesn't display in Firefox.
• I copy-pasted "The Thinker" into this file to see if it was something peculiar to the original file.
• Then I copy-pasted "The Brain" to see if it had the same anomaly.
• I tried resizing each image.
• I tried adjusting the blurred edge and opacity of each image.
• I don't see any property differences between the two images (they are both 'clipped').
• I exported as a web page and did notice something a bit different in the source code, which I will also upload (it's the txt file-no html uploads here), but I'm not HTML savvy enough to know if it's a hint to the answer.

I just figured out a semi-undesirable work-around (does anybody else find one?), but I'd like to know what caused this in the first place so I/we can avoid it in the future.

Any ideas?