Posted 16 April 2008 - 08:17 AM
Well, it does mean you'll need to be more exacting in how you use forms if you've been using them to stop spiders from reaching certain areas of a site. Let's just say I've put it on my To Do list to review the various forms on my various sites to make sure I'm using the POST method in all of those places that need it.
As a possible positive, I suppose this does mean Google might be able to find Site Search results pages more easily. I'm not sure if that's a good thing or not, since I've always found it quite easy to get those pages I want to be indexed anyway. And being a stickler I like to get them to the content I want them to get to, not what some algo thinks it might want to get to.
Here's a good test for someone to perform, just to see what will happen. Set up a simple one-input form and place a default value in the form box. The watch your logs to see if Googlebot "submits" the form, with your default value intact. My hunch is you'll probably see them looking for that default value, but it's purely a guess.