I wrote this post after hours of frustration, trying to fix my broken environment, and losing valuable time on a project that was falling behind.
I now realize that the post was overly emotional, and probably not entirely fair to the Aptana team. I'll post updates here as I work through the issues to get my RadRails working again.
I'm sorry to hear that you're having issues and I'd like to help. As part of our RadRails release, we spent a significant amount of time adding many new features and fixing existing bugs with the goal of giving people a great Rails development environment.
It sounds as if Aptana Studio may have had an issue with some old configuration information when you re-installed. You might try the steps here to see if it solves your issue:
We're mostly Mac users here. I'm trying out the latest version of the standalone version on OS X 10.5.2 and I'm unable to reproduce the Apple-Shift-R issue, so any help in reproducing the problem so we can fix the issue would be greatly appreciated.