I just upgraded to 4.21, and I am getting an error when approving a comment. The error is:
Can't call method "date_based" on an undefined value at lib/MT/Template/ContextHandlers.pm line 12846.
I looked at ContextHandler.pm, but I do not notice anything odd. Of course I can wrap the offending line with a if defined statement, but I wonder what really is the problem. By the way, the comment is approved.
The only plugin I have is Typepad Antispam 1.0.
thanks in advance, .mau.