Prepare for broken mods
From the current SITREP
Quote:
We now have a pretty good picture of the consolidated Eden Update package. It is shaping up to be an awesome free update to Arma 3, made possible by your support for the game. We have created our data snapshot and applied the usual development locks, so that we can begin to focus on testing and tweaking the update as a whole. This also means that we'll open the Steam Release Candidate testing branch this or next week.
We'll do our best to stress test the update ourselves and to ensure that no new issues are introduced. We do however really need your help, especially when it comes to custom mods and other variables we can't directly control. Please focus on truly new issues and report them to Feedback Tracker with a clear indication that they were tested in the RC build. If an issue looks like it may be in custom content, kindly forward the details to the authors of that content as well. There are a number of complex platform changes that may affect compatibility even though we've striven to guard back-compat throughout. The powerful new Eden Editor affects code in the engine that is shared by both editors, the low-level audio engine was overhauled, many scripted functions were optimized and replaced by script command calls, etc. All of these will bring the platform forward in huge ways, but there is an element of risk. Together we can minimize problems, and should they occur, we'll work hard to solve them as quickly as possible. Ultimately the game will be much better for it!
http://dev.arma3.com/post/sitrep-00140