Gnus v5.13
GNU Emacs 24.0.50.1 (i386-mingw-nt6.1.7600)
 of 2010-10-05 on MARVIN

In Emacs trunk rev101802, the sorting of articles by most recent
(date|number) does not work.

Start Gnus
T T
M-x gnus-summary-sort-by-most-recent-date

results in this error

`gnus-sort-articles: Wrong type argument: listp,
gnus-article-sort-by-most-recent-date'

Same error happens with `M-x gnus-summery-sort-by-most-recent-number'.

Christoph