I also think this forum can do it's part with a sticky for each version - or at least each version with major regressions. Something that describes the gotchas in general terms.
I agree. They were doing that for a while and the lead developer was even participating in the thread but that hasn't happened for the last few versions now. The threads did get really long. I think it would work best to make a wiki page on the Arduino Playground for each IDE release so everyone can edit it and keep the information organized. Put a link to that Playground page in the release thread and then use that thread for discussion of the release and the information on the release page on the Playground.
I know this is work.
Actually way less work for us than giving the same information over again on every thread and less work for users trying to find information, though they would actually need to take the time to click on the link and read the information. It would require a moderator to make the sticky though...
The trouble with telling people to just read the forum is that many topics don't include the IDE version. So people with problems are drinking from a firehose.
Forums are fine for discussion/chitchat or one-on-one help but terrible as a way of organizing information. I see the same questions and the same answers over and over here.
I feel sorry for new people unfortunate enough to download a bad release as their first. What an impression that must make.
I know if I had run into a ton of bugs when I was first starting with Arduino it would have been very discouraging. It's just a hobby for me so it has to be fun. Beginners encounter so many issues of their own making that when you throw in a bunch of built in bugs it makes the learning curve much steeper.