Yesterday announced some pretty big changes to their royalty program for contributors, along with more changes to collections (Vetta, Getty, etc.) and a few other things that will affect buyers as well. A friend and fellow iStockphoto contributor Sean Locke wrote up a detailed blog post about the changes … take a look at his post over on his blog.

I won’t get into the details of how this will affect me other than I’m fairly confident that I won’t see a change in my own royalty percentage. There is, however, a big uproar in the iStock forums from some very unhappy contributors (check it out here).