Page won’t show

I’ve added some old pages from previous sites to my wordpress site.
One page doesn’t show when using the perm link:

http://www.beket.nl/1998/07/24/twee-keer-klikken/

The other works fine:
http://www.beket.nl/1998/07/23/underdog-streepjes/

The strange thing is – I thought the first might contain funny characters or just is too long to be displayed (?) – the first page DOES show completely in a category list:
http://www.beket.nl/archief/blog/page/2/

Any ideas what’s going on?

TIA,
Edde