Merging fixes and updates from stable branch

Fixed: RenderMan::getPage() failing with access denial when fetching template and view_source results in deny

Made all captcha fields case-insensitive (thanks pkeating)

Merging scribus and nighthawk branches

Fixed special pages being returned with subpage information inappropriately from $paths->get_pageid_from_url()

Fixed jBox menus failing to appear when window scrolled down

Fixed case where HTML comments were getting stripped when opening tag not followed by whitespace (<!--foo--> was stripped, <!-- foo --> was not, neither is stripped now)

Re-applying the revision with the comment fix (bad merge a couple revs back)

Fixed case where HTML comments were getting stripped when opening tag not followed by whitespace (<!--foo--> was stripped, <!-- foo --> was not, neither is stripped now)

Merging in a couple revisions from Nighthawk

Fixed broken regenCaptcha() in Special:Register

Not sure if $taboo was getting sanitized or not. Possibly an SQL injection vulnerability that allows maliciously crafted group names to inject SQL at a later date when the group CP is loaded. Unconfirmed, theoretical fix.

Removed all PostgreSQL support from the installer as per http://enanocms.org/News:1200114064; installer support for Postgres is available in the 1.1 branch now

Fixed case-sensitive file extensions

PHP4 fix: sidebar missing in installer UI: problem was wrongly named constructor for templateIndividualSafe

Fix undefined E_STRICT under PHP 4; add PHP 4 deprecation notice in admin panel