At TDH we use quite a few transparent PNG graphics files. IE6 and earlier browsers do not fully support PNG transparency. Graphics will appear with a bland grey background. We strongly encourage our IE6 users to upgrade to IE7 or Firefox which do support PNG transparency and will allow you to view TDH (and other websites) as they were intended to be seen!
Microsoft IE7 Download Page
Mozilla Firefox Download Page
Microsoft IE7 Download Page
Mozilla Firefox Download Page