Is there an easy way to turn Debug Mode off without logging into the Back Office for the first time?
I too am having this issue, but with PS 1.7.0.4
I have already changed the "PS_CIPHER_ALGORITHM", but I am still unable to login.
I am experiencing the same behaviors that the OP is experiencing. I enter the proper login details and the page acts like it's going to login, but instead it just reloads the login page (doesn't give any errors or anything).
I've cleared my cookies, logs, caches, etc. I've changed browsers and tried it on different computers with different operating systems, using different IP's.
No luck...