Prior to the switch and in most applications about this passenger running rails 2. my routes would yield "myapp/controller/action"

Description of how the yield "controller/action". Oddly enough the stylesheet_link_tags will work normally.

I prepend a prefix within the production atmosphere to cope with this but it's a hideous hack obviously.

Any assistance is appreciated.

After Passenger 2.2.3 fixed this it's most likely not this type of large deal any longer but simply with regard to completeness, I publish the solution, when i thought it was out today.

All one needs to do is paste this into atmosphere.rb

config.action_controller.relative_url_root = "/myapp"

The issue was associated with how rails handles Sub-URI deplopyments, it was transformed in version 5.2 apparently and broke my code.