Test page showing the GIF bug in cpcwiki.
Below GIF and JPG are pixel-identical, but, the GIF is shown correctly only in fullsize, but not when resampled to smaller sizes.
100px
- PNG 100px - okay
- GIF 100px - black colors are lost during resampling
Gallery
PNG - okay
GIF - no anti-alising
Fullsize
- PNG full
- GIF full