fedora rawhide evolution-2.7.2.1-1 srpm
Sorting by "To" or "Subject" doesn't seem to work properly.
Rebuilding with a patch reverting this commit between 2.7.1 and 2.7.2.1 fixes it

2006-04-26  Srinivasa Ragavan  <sragavan@novell.com>

       ** Patch from Victor for adding a Sender header to message list.

       * message-list.c (ml_duplicate_value, ml_free_value),
       (ml_initialize_value, ml_value_is_empty, ml_value_to_string),
       (ml_tree_value_at): Handled the new column header.

       * message-list.etspec: Added a new column header to spec.

       * message-list.h: Added a new column