2.6 sub pages named numeric characters not loading

Just installed a fresh WP 2.6 and noticed a strange problem: when I set a page title/permalink name to just numbers (ie: ‘1’, ’44’, ‘123456’) and give it a parent page, it fails to show up.

If the page isn’t a sub page, it’ll show up, otherwise the immediate parent page will load instead.

The Settings > Permalink settings are:

Custom Structure : /news/%postname%
Category Base : /categoryTag Base : /tag

So, all news posts should be at /news/postname while pages should ignore the /news/ and simply be /postname/.

Changing the structure around gives me these outcomes:

Custom Structure : /news/%postname%

‘/parent/55/’ only loads ‘/parent/’.

Custom Structure : /index.php/%postname%

Everything works fine.

Custom Structure : /index.php/news/%postname%

‘/parent/55/’ only loads ‘/parent/’ again.

Custom Structure : /%postname%

Everything works fine.

Anyone have any idea what’s going on? I thought I’d just hack at the htaccess file, but there’s little there to change

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wp/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp/index.php [L]
</IfModule>

# END WordPress

Help?

FYI: the Default permalink structure /?p=123 makes everything work fine, but is less than stellar as a permanent fix. Also, I’m on Apache 2.2.9.