What is the following icon used for?

It is a rectangle with a small black triangle at the lower right.  It has another rectangle in the center of the outer one that has what looks like a gradient in it.  Lighter to the left and darker to the right.  I am taking a test and they want to know the following:
creating an inverted image, reversing the existing color palette
creating a cloud pattern using two colors
creating a color gradient using two or more colors
What is the answer?  I have never seen this before and I do not have CS5.
Thanks, the sooner the better...

I'm thinking they just stylized it, because no, it doesn't exactly match the gradient icon in the Tools panel in the current release of Photoshop.
Here's the same tool in Photoshop 6.0 (6 major versions older).  That's closer, but still not a perfect match.
For completeness, here's what it looks like in PS CS6:
-Noel

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    It is now confirmed  that iWeb, and iDVD, has been discontinued by Apple. This is evidenced by the fact that new Macs are shipping with iLife 11 installed but without iWeb and iDVD.
    On June 30, 2012 MobileMe will be shutdown. However, iWeb will still continue to work but without the following:
    Features No Longer Available Once MobileMe is Discontinued:
    ◼ Password protection
    ◼ Blog and photo comments
    ◼ Blog search
    ◼ Hit counter
    ◼ MobileMe Gallery
    All of these features can be replaced with 3rd party options.
    I found that if I published my site to a folder on my hard drive and then uploaded with a 3rd party FTP client subscriptions to slideshows and the RSS feed were broken.  If I published directly from iWeb to the FPT server those two features continued to work correctly.
    There's another problem and that's with iWeb's popup slideshows.  Once the MMe servers are no longer online the popup slideshow buttons will not display their images.
    Click to view full size
    However, Roddy McKay and I have figured out a way to modify existing sites with those slideshows and iWeb itself so that those images will display as expected once MobileMe servers are gone.  How to is described in this tutorial: #26 - How to Modify iWeb So Popup Slideshows Will Work After MobileMe is Discontinued.
    It now appears that the iLife suite of applications offered on disc is now a discontinued product and the remaining supported iApps will only be available thru the App Store from now on. However, the iLife 11 boxed version that is still available at the online Apple Store (Store button at the top of the page) and those still on the shelves of retailers will include iWeb and iDVD. Those two apps were listed in small, gray text on the iLife 11 box that I bought.
    Personally, if I didn't already have a copy I would purchase one to have it for reinstallation purposes if ever needed.
    This might be of some interest to you at this time: Life After MobileMe.
    OT

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