I was at my mom's house tonight and I was showing her and my aunt my designs. I have a couple headers done as a PNG files so as to have the transparent background. So when there was a cut out part you could see the background behind it. That is also how I did my sidebar tags (ie dashboard, grab my button etc...)

On my mom's computer anything that was a PNG file didn't have the transparent background. Instead the transparent part was a light gray color so you couldn't see through it. Which of course made the design we were looking at not like I had intended it to be viewed.

It looks fine on my computer and fine on my sister's two computers and my grandma's computer. But then I wondered if some of my designs look wrong on other peoples computers also, or was it just my moms that it looked funny?