Starting with the latest (downloaded roughly 10am ET 1/5/09) nightly build (may have started earlier, but I was horribly behind in my updates) I can no longer login to OS X Server Wiki sites. When I try, I get an alert window showing the URL and the following message:
Error from server: Incorrect padding (8002)
I am still able to login fine using Safari 3.2.
If it makes a difference, my user name is my first and last name in camel case with no spaces or special characters and it is 11 characters long. My password contains 2 upper case letters, 2 numbers, 2 special characters, and 4 lower case letters.
I'm seeing this too, WebKit build 39953, wikis are on Mac OS X Server 10.5.6. Nothing special about my login credentials.
I had experienced this, upgraded to 40884.
Verified fixed in 40884
Unsure which build resolved it
Apparently, this was fixed in <http://trac.webkit.org/changeset/39984> by Geoff Garen.