Macintosh users: If you are having a problem displaying PNG files in Internet Explorer under OS X try this fix:

Step 1:

• Go into the Quicktime control panel in System Preferences.
• Under the plug-in section, click the "MIME Settings..." button.
• Expand the "images" category, and deselect the "PNG image file" option. This tells the quicktime plugin you no longer wish it to attempt to seize authority over PNG images in your web browser.
• Click OK to save your changes and exit System Preferences.

Step 2:

• Launch Internet Explorer and go into the preferences.
• Go to the "File Helpers" category.
• Sort by extension, so you can find the two (2) ".png" categories (titled "PNG Image [image/x-png]" and "Portable Network Graphic [image/png]").
• Edit both these (click "change") in the last category "Handling", change to "View with Browser" for each.
• Once you have done both, click OK to exit preferences.

You may want to consider switching browsers to Safari or Netscape (which don't have this issue). Microsoft is no longer developing Internet Explorer for Macintosh and so it will probably become more buggy as internet technology changes.

If you have any problems, feel free to and I’ll be happy to help.