Hi Johan,
The problem is that I don't really have time to create a sample solution. I can create a case if you like, but quite simply, security.login no longer directs to a solution's first form. Whatever code was changed form 5.2.2 to 5.2.3 in regards to security.login for solutions using a custom login form w/o enhanced security has broken first-form loading.
What is troublesome to me with this particular problem is that my solutions all implement the same generic login code, and different solutions need to redirect to different forms after login, but I do not believe there is an accessor for getting a solutions first form is there? So how do I redirect appropriately now? A big if-else chain checking the solution name?