Indeed, you are correct, some of the posts on the thread were relative to 2.0 and some for 2.1. But, in both cases, the authentication issues are the same: attempts to use EB (compile, change project properties) force an authentication dialog that never authenticates. I don't have screenshots for you because I have downgraded to 2.0 and the entire install process is so time-consuming that it has already cost us project downtime, so I am hoping simple steps to replicate are sufficient (if not, let me know and I will do a weekend install for the purposes of demonstration):
1 Uninstall the current FB install.
2 Install EB 2.1 (Mac, OS 10.8.4), which includes FB 4.6 and CS 2.1
3 Import a current CSEB-based project into the workspace.
4 As FB attempts to rebuild the workspace, it throws up an authentication dialog (CSIDE1 is the window title) asking for Adobe ID and password.
5 Enter valid credentials and click to authenticate.
6 You are returned to FB...where authentication re-spawns any time you interact with tools used by EB (i.e., compiler, manifest builder, properties, etc.)
Now, in all other cases where interaction is required with Adobe for the purposes of authentication, all goes swimmingly. I don't know whether these are permissions issues (doesn't seem likely, although I haven't tested that theory), the result of a poor uninstall (not likely either)....I just know there's no way to use the IDE unless you turn off automatic builds and don't interact with anything related to EB, which pretty much rules out the development process.
Upon downgrading to EB 2.0 (i.e., uninstall of FB, install of 2.0), all is fine with the world.
Again, if this information is insufficient, don't hesitate to ask for more.