Emacs master breaks date-field (in summary buffer)

Hi,


after upgrading Emacs master to
b6d9613df83813609ef80da45975e70954d1fb6d new messages show 00/00/00 in
summary buffer and after running wl-summary-sync all-entirely all
messages show the wrong date.
 
Is think this is caused by commit
949144c279e07e870ef4ee2de38787420b749828 in which string-to-int has
been removed.

Do we have to change string-to-int to string-to-number in apel (e.g
timezone.el)?

Thanks.

--
Herbert