Some students will currently find that they cannot log in to a number of University systems, most often with an error that their password is incorrect. In most instances, it is the authenticators that are behaving erroneously, rather than an actual problem with usernames and passwords. Applications that are known to be affected especially badly are ROSS (most students cannot log in) and the caching proxy servers (students will be able to log in intermittently).
The cause of this problem is known, and it appears to have occurred at 20:42 last night. Whilst we'll attempt to resolve this issue as soon as possible, we cannot guarantee this will happen before Monday (see after hours support).
This problem will not affect staff or guest logins.