I posted about this months ago (august or so) and got an attempt at a fix, but that didn't seem to do much. The problem is that my rails app will work perfectly most of the time, then intermittently get 500 errors just out of the blue. 99% of the time, hitting refresh on the 500 error will bring up the page you were trying to get in the first place.
The issue is not specific to dreamhost, but I'm curious if they're working on a solution. Here's some info I found from textdrive, and their proposed solution:
If I'm reading this right, it sounds like anybody with a rails app could be randomly affected, and as more people use fastcgi on a given server, it becomes more and more likely they'll hit this problem.
Is DreamHost aware of this issue? Is it being addressed? When my app goes live (someday), I think it'll look pretty unprofessional to have every 10th or 20th page request pop up an error...