Png Image Showing Black Background. Checking it is simple enough. New comments cannot be posted and votes cannot be cast.

However when i put it on my webpage or upload with wordpress it shows up black. Download and install any app that supports viewing transparency. A png file or an icn or svg one may not have transparency.
It worked fine in cs5 so it must be a bug.
These images are one i created and exported using save for web. However when i put it on my webpage or upload with wordpress it shows up black. View the file s thumbnail in file explorer. My every png file thumbnail background is black and not transparent.