Ran into a weird bug (applies to Apache httpd 1.3.39 and 2.0.40 -- not sure about later 1.x and 2.0.x releases -- but certainly doesn't apply to 2.2.8, where it appears to work correctly) where mod_rewrite exposes the absolute path in the redirect (which then fails).

In a subdirectory off my web root (and root of a virtual host), I have a .htaccess file:

RewriteEngine On
RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^anthonpang\.com [NC]
RewriteRule (.*) http://anthonpang.com/$1 [R,L]

The URL (yes, I left off the trailing slash):

http://example.com/anthonpangcom

Mysteriously becomes:

http://example.com//home/robocoder/public_html/anthonpang

I say mysterious, because the behaviour depends on the domain I use in RewriteRule. For example, anthonpang.ca does get rewritten correctly.

That said, it's probably "minor" as I don't expect to publish or link to the subdirectory-based URL when this goes "live".