[Mediawiki-l] Session ID Anomaly

[Curt at Down in the Country]

The MediaWiki installation at
http://co-op.downinthecountry.com/wiki
has session ID issues. The session ID written to php_sessions has
"sess_" prefixed to it; the session ID sent to the browser does not.

Thus, it is impossible to remain logged in.

Can someone aim me at possible causes? It's a vanilla install; php
version 5.2.5.

First install was mediawiki-1.14.0; now running mediawiki-1.15.0rc1.
Both had the same issue.

TIA.

-- 
Best regards,
 Curt
 http://FiberyCo-Op.com
http://TheGreyhoundSagas.com
http://keepthefleece.org

If the facts don't fit the theory, change the facts. ~Albert Einstein