Thanks again for the feedback. I posted a "notice" on the cache issue - this shows at the top of the forums under Notices and is dismissible (you can click on the red x if you are logged in).
Then I also posted an "announcement" in the Dreamweaver Extensions section - meaning one post goes at the top of every forum within that section. This save redundancy of the same thread in a bunch of different places, which would probably look kind of sloppy if people are using the New Posts link or using RSS to read threads.
Hopefully these two things will also allow people to help themselves before they get frustrated. I agree that some people will always post before they read ANYTHING but this is that much more obvious and maybe we can decrease the number of those folks at least a bit.