I'm using WP MU 2.9.2. All of a sudden, users can't register. When they click "Complete Sign Up" there's a blank screen. I haven't added or deleted any plugins - it just stopped working.
I'm very wary of upgrading to 3.3.1 b/c the theme and current plugins are very dependent on the older version. So I'm wondering what file I could upload to overwrite my current installation to maybe fix this.
Or any other pointers....
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