I must be a madman.

Trying to log in to appDynamics. enter account name, hit ENTER -- <...>/appdynamics.com/controller/undefined, 404: Page not found.

Go back, do that again -- same result

Go back, ctrl+F5, try again -- same result.

So in the end I did 17 or 19 back-retry attempts in a row and the last one DID log me in.

Peachy.

<F><U><C><K.<J><S>