Trac errors when creating a ticket with a Blocking: field

I got an error message when filing ticket #10694 (closed), though the ticket was in fact created. The error was:

Trac detected an internal error:
AttributeError: 'NoneType' object has no attribute 'split'

Possibly it had something to do with the fact that I filled in the Blocking: field?

Update: I think so, since I did the same on this ticket to test and Trac errored again. If Trac is just erroring on all ticket creation I assume it will be fixed quickly :)

Specifically, I entered the value #10678 when filing #10694 (closed). Maybe I wasn't supposed to include the #.