Proxy cookies broken in 1.0...?

I'm messing around with 1.0b2 and having problems with login (which I
guess is a cookie issue). If I connect to the instance directly (port
8668) then everything works fine, but if I connect via an Apache
proxy, the login only succeeds for the following page, and is then
dropped.

I've just tested again with 0.5.2a and the problem doesn't arise there.

I'm using the Apache rewrite module. Here's a chunk of my httpd.conf:

<VirtualHost 66.199.228.111>
    ServerName wiki.cassiel.com
    ....
    RewriteRule ^/((space|comments|theme|exec)/.*) http://127.0.0.1:8668/cassiel-wiki/$1 [P]
</VirtualHost>

Is there an obvious reason why login would break, when proxied,
between 0.5.2a and 1.0b2?

	-- N.

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-- 

  nick rothwell -- composition, systems, performance -- http://www.cassiel.com