2004.10.01 07:22 "[Tiff] BigTIFF extension issue", by Joris Van Damme

2004.10.04 23:11 "Re: [Tiff] Re: BigTIFF extension issue", by Chris Cox

I'm curious - can you name some examples please. I'd be interested in hearing about some and seeing exactly what the differences are/were between 'changes'.

Photoshop PSD -> 8 byte offsets became PSB because users couldn't understand why it wouldn't open in older versions of Photoshop (having been mostly compatible from 3.0 to 7.0).

PDF and EPS are examples where the version number didn't change, but older apps may break or not read the files.

JPEG -> JPEG2000: same group, same goal, different format, different extension

Most of my other examples are along the lines of PSD -> PSB, but aren't image formats.

In short: it's easy to change the internal version number ONLY if customers don't have an expectation that this file format will somehow always work across applications and versions.