On Wed, 26 Mar 2003, I scribbled hastily:
Another thing; on phase 2, we had problems with the caching code wherein some things that were determined from parsing the page (interlanguage links and link keywords for a meta tag) got dropped when viewing the page cached.
To clarify: phase 2 cached the html output of the wikitext, but not the surrounding template/skin, so page-specific things that fell into that outside (uncached) area but required data gotten from parsing weren't available.
-- brion vibber (brion @ pobox.com)