It all worked well unitl I upgraded to Apex 4.1. Now POST_LOGIN keeps throwing that "Invalid login credentials" message. It looks that functionality of POST_LOGIN has been changed in 4.1.I am seeing the same thing... I am developing on an Apex 4.0 instance, and deploying to an Apex 4.1 (runtime-only) instance.
as Apex is a supported product, if you've got a support contract for a database license, you could log a service request and push through what looks like a bug there. This will get a better response than waiting for someone to pick up the issue from a voluntary forum.That's true, but as you probably also know, the Apex team frequently visit this forum and respond to posts, especially about bugs and potential bugs.