Problem with transparent PNGs

Hello,

So far, I really like your widget! I’m still trying to figure out the best timing settings.

Anyway, I’m having problems with any transparent PNG images looking the way they’re supposed to.

Please look at the image of the small dog on this test page: http://pawsandprintsphotography.com/the-411/prints/

The image SHOULD look like this with the rounded corners:

http://pawsandprintsphotography.com/contact/

Any idea why it isn’t appearing the same as on my Contact page? All of my rotator photographs are going to look like that (rounded corners), so I really need to figure this out and hope it’s an easy coding fix.

Thanks so much for your help!

https://wordpress.org/plugins/weptile-image-slider-widget/