Mozilla and firebird images on title plage are too large: http://www.mozilla.org/frontpage/productIconMozilla.png - 55 kB http://www.mozilla.org/frontpage/productIconFirebird.png - 37 kB Try to convert it to GIF with reduced color palette - attached images have 14 kB and 9 kB with no visible difference.
The biggest problem with these images is that they were made in PhotoShop so they're not compressed as well as they could and they have iCC profiles, e.g. File: productIconMozilla.png (56739 bytes) chunk IHDR at offset 0x0000c, length 13 210 x 183 image, 24-bit RGB, interlaced chunk iCCP at offset 0x00025, length 2615 profile name = Photoshop ICC profile, compression method = 0 (deflate) compressed profile = 2592 bytes chunk gAMA at offset 0x00a68, length 4: 0.45454 chunk cHRM at offset 0x00a78, length 32 White x = 0.31269 y = 0.32899, Red x = 0.63999 y = 0.32998 Green x = 0.29998 y = 0.59999, Blue x = 0.14999 y = 0.05999 chunk IDAT at offset 0x00aa4, length 53995 zlib: deflated, 32K window, default compression chunk IEND at offset 0x0dd9b, length 0 No errors detected in productIconMozilla.png (50.8% compression). pngcrush reduces the size by 19%. It's quite true that paletted images are smaller but a paletted PNG is smaller than a GIF. Aren't there still some patent issues with GIFs in some countries? Making proper PNGs seems more productive.
> It's quite true that paletted images are smaller but a paletted PNG is > smaller than a GIF. Feel free to provide paletted PNG files. > Aren't there still some patent issues with GIFs in some countries? Patent issues are only for programs with GIF creating functionality, not for users.
> Feel free to provide paletted PNG files. I'm not going to mangle an image without the author's permission so paletted PNGs are out for the moment. I can strip out the ICC profile and make it non-interlaced which gets ~31% size reduction. The better solution is to generate smaller images from the beginning. BTW, staying with PNGs means not having to edit the web pages which is good. > Patent issues are only for programs with GIF creating functionality, > not for users. The Mozilla Foundation is probably the creator of these images so patent issues do apply.
this bug is obsolete now